diff --git a/routers/web/repo/setting/webhook.go b/routers/web/repo/setting/webhook.go
index 4469eac9e8..eee493e2c2 100644
--- a/routers/web/repo/setting/webhook.go
+++ b/routers/web/repo/setting/webhook.go
@@ -148,7 +148,7 @@ func WebhookNew(ctx *context.Context) {
 }
 
 // ParseHookEvent convert web form content to webhook.HookEvent
-func ParseHookEvent(form forms.WebhookForm) *webhook_module.HookEvent {
+func ParseHookEvent(form forms.WebhookCoreForm) *webhook_module.HookEvent {
 	return &webhook_module.HookEvent{
 		PushOnly:       form.PushOnly(),
 		SendEverything: form.SendEverything(),
@@ -188,7 +188,7 @@ func WebhookCreate(ctx *context.Context) {
 		return
 	}
 
-	fields := handler.FormFields(func(form any) {
+	fields := handler.UnmarshalForm(func(form any) {
 		errs := binding.Bind(ctx.Req, form)
 		middleware.Validate(errs, ctx.Data, form, ctx.Locale) // error checked below in ctx.HasError
 	})
@@ -215,10 +215,10 @@ func WebhookCreate(ctx *context.Context) {
 		w.URL = fields.URL
 		w.ContentType = fields.ContentType
 		w.Secret = fields.Secret
-		w.HookEvent = ParseHookEvent(fields.WebhookForm)
-		w.IsActive = fields.WebhookForm.Active
+		w.HookEvent = ParseHookEvent(fields.WebhookCoreForm)
+		w.IsActive = fields.Active
 		w.HTTPMethod = fields.HTTPMethod
-		err := w.SetHeaderAuthorization(fields.WebhookForm.AuthorizationHeader)
+		err := w.SetHeaderAuthorization(fields.AuthorizationHeader)
 		if err != nil {
 			ctx.ServerError("SetHeaderAuthorization", err)
 			return
@@ -245,14 +245,14 @@ func WebhookCreate(ctx *context.Context) {
 		HTTPMethod:      fields.HTTPMethod,
 		ContentType:     fields.ContentType,
 		Secret:          fields.Secret,
-		HookEvent:       ParseHookEvent(fields.WebhookForm),
-		IsActive:        fields.WebhookForm.Active,
+		HookEvent:       ParseHookEvent(fields.WebhookCoreForm),
+		IsActive:        fields.Active,
 		Type:            hookType,
 		Meta:            string(meta),
 		OwnerID:         orCtx.OwnerID,
 		IsSystemWebhook: orCtx.IsSystemWebhook,
 	}
-	err = w.SetHeaderAuthorization(fields.WebhookForm.AuthorizationHeader)
+	err = w.SetHeaderAuthorization(fields.AuthorizationHeader)
 	if err != nil {
 		ctx.ServerError("SetHeaderAuthorization", err)
 		return
@@ -286,7 +286,7 @@ func WebhookUpdate(ctx *context.Context) {
 		return
 	}
 
-	fields := handler.FormFields(func(form any) {
+	fields := handler.UnmarshalForm(func(form any) {
 		errs := binding.Bind(ctx.Req, form)
 		middleware.Validate(errs, ctx.Data, form, ctx.Locale) // error checked below in ctx.HasError
 	})
@@ -295,11 +295,11 @@ func WebhookUpdate(ctx *context.Context) {
 	w.URL = fields.URL
 	w.ContentType = fields.ContentType
 	w.Secret = fields.Secret
-	w.HookEvent = ParseHookEvent(fields.WebhookForm)
-	w.IsActive = fields.WebhookForm.Active
+	w.HookEvent = ParseHookEvent(fields.WebhookCoreForm)
+	w.IsActive = fields.Active
 	w.HTTPMethod = fields.HTTPMethod
 
-	err := w.SetHeaderAuthorization(fields.WebhookForm.AuthorizationHeader)
+	err := w.SetHeaderAuthorization(fields.AuthorizationHeader)
 	if err != nil {
 		ctx.ServerError("SetHeaderAuthorization", err)
 		return
diff --git a/services/forms/repo_form.go b/services/forms/repo_form.go
index b5ff031f4b..e0540852af 100644
--- a/services/forms/repo_form.go
+++ b/services/forms/repo_form.go
@@ -12,6 +12,7 @@ import (
 	"code.gitea.io/gitea/models"
 	issues_model "code.gitea.io/gitea/models/issues"
 	project_model "code.gitea.io/gitea/models/project"
+	webhook_model "code.gitea.io/gitea/models/webhook"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/web/middleware"
@@ -235,8 +236,8 @@ func (f *ProtectBranchForm) Validate(req *http.Request, errs binding.Errors) bin
 //   \__/\  /  \___  >___  /___|  /\____/ \____/|__|_ \
 //        \/       \/    \/     \/                   \/
 
-// WebhookForm form for changing web hook
-type WebhookForm struct {
+// WebhookCoreForm form for changing web hook (common to all webhook types)
+type WebhookCoreForm struct {
 	Events                   string
 	Create                   bool
 	Delete                   bool
@@ -265,20 +266,30 @@ type WebhookForm struct {
 }
 
 // PushOnly if the hook will be triggered when push
-func (f WebhookForm) PushOnly() bool {
+func (f WebhookCoreForm) PushOnly() bool {
 	return f.Events == "push_only"
 }
 
 // SendEverything if the hook will be triggered any event
-func (f WebhookForm) SendEverything() bool {
+func (f WebhookCoreForm) SendEverything() bool {
 	return f.Events == "send_everything"
 }
 
 // ChooseEvents if the hook will be triggered choose events
-func (f WebhookForm) ChooseEvents() bool {
+func (f WebhookCoreForm) ChooseEvents() bool {
 	return f.Events == "choose_events"
 }
 
+// WebhookForm form for changing web hook (specific handling depending on the webhook type)
+type WebhookForm struct {
+	WebhookCoreForm
+	URL         string
+	ContentType webhook_model.HookContentType
+	Secret      string
+	HTTPMethod  string
+	Metadata    any
+}
+
 // .___
 // |   | ______ ________ __   ____
 // |   |/  ___//  ___/  |  \_/ __ \
diff --git a/services/webhook/default.go b/services/webhook/default.go
index be3b9b3c73..314f539648 100644
--- a/services/webhook/default.go
+++ b/services/webhook/default.go
@@ -5,13 +5,8 @@ package webhook
 
 import (
 	"context"
-	"crypto/hmac"
-	"crypto/sha1"
-	"crypto/sha256"
-	"encoding/hex"
 	"fmt"
 	"html/template"
-	"io"
 	"net/http"
 	"net/url"
 	"strings"
@@ -21,6 +16,7 @@ import (
 	"code.gitea.io/gitea/modules/svg"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 var _ Handler = defaultHandler{}
@@ -39,16 +35,16 @@ func (dh defaultHandler) Type() webhook_module.HookType {
 func (dh defaultHandler) Icon(size int) template.HTML {
 	if dh.forgejo {
 		// forgejo.svg is not in web_src/svg/, so svg.RenderHTML does not work
-		return imgIcon("forgejo.svg", size)
+		return shared.ImgIcon("forgejo.svg", size)
 	}
 	return svg.RenderHTML("gitea-gitea", size, "img")
 }
 
 func (defaultHandler) Metadata(*webhook_model.Webhook) any { return nil }
 
-func (defaultHandler) FormFields(bind func(any)) FormFields {
+func (defaultHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		PayloadURL  string `binding:"Required;ValidUrl"`
 		HTTPMethod  string `binding:"Required;In(POST,GET)"`
 		ContentType int    `binding:"Required"`
@@ -60,13 +56,13 @@ func (defaultHandler) FormFields(bind func(any)) FormFields {
 	if webhook_model.HookContentType(form.ContentType) == webhook_model.ContentTypeForm {
 		contentType = webhook_model.ContentTypeForm
 	}
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: contentType,
-		Secret:      form.Secret,
-		HTTPMethod:  form.HTTPMethod,
-		Metadata:    nil,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     contentType,
+		Secret:          form.Secret,
+		HTTPMethod:      form.HTTPMethod,
+		Metadata:        nil,
 	}
 }
 
@@ -130,42 +126,5 @@ func (defaultHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook,
 	}
 
 	body = []byte(t.PayloadContent)
-	return req, body, addDefaultHeaders(req, []byte(w.Secret), t, body)
-}
-
-func addDefaultHeaders(req *http.Request, secret []byte, t *webhook_model.HookTask, payloadContent []byte) error {
-	var signatureSHA1 string
-	var signatureSHA256 string
-	if len(secret) > 0 {
-		sig1 := hmac.New(sha1.New, secret)
-		sig256 := hmac.New(sha256.New, secret)
-		_, err := io.MultiWriter(sig1, sig256).Write(payloadContent)
-		if err != nil {
-			// this error should never happen, since the hashes are writing to []byte and always return a nil error.
-			return fmt.Errorf("prepareWebhooks.sigWrite: %w", err)
-		}
-		signatureSHA1 = hex.EncodeToString(sig1.Sum(nil))
-		signatureSHA256 = hex.EncodeToString(sig256.Sum(nil))
-	}
-
-	event := t.EventType.Event()
-	eventType := string(t.EventType)
-	req.Header.Add("X-Forgejo-Delivery", t.UUID)
-	req.Header.Add("X-Forgejo-Event", event)
-	req.Header.Add("X-Forgejo-Event-Type", eventType)
-	req.Header.Add("X-Forgejo-Signature", signatureSHA256)
-	req.Header.Add("X-Gitea-Delivery", t.UUID)
-	req.Header.Add("X-Gitea-Event", event)
-	req.Header.Add("X-Gitea-Event-Type", eventType)
-	req.Header.Add("X-Gitea-Signature", signatureSHA256)
-	req.Header.Add("X-Gogs-Delivery", t.UUID)
-	req.Header.Add("X-Gogs-Event", event)
-	req.Header.Add("X-Gogs-Event-Type", eventType)
-	req.Header.Add("X-Gogs-Signature", signatureSHA256)
-	req.Header.Add("X-Hub-Signature", "sha1="+signatureSHA1)
-	req.Header.Add("X-Hub-Signature-256", "sha256="+signatureSHA256)
-	req.Header["X-GitHub-Delivery"] = []string{t.UUID}
-	req.Header["X-GitHub-Event"] = []string{event}
-	req.Header["X-GitHub-Event-Type"] = []string{eventType}
-	return nil
+	return req, body, shared.AddDefaultHeaders(req, []byte(w.Secret), t, body)
 }
diff --git a/services/webhook/dingtalk.go b/services/webhook/dingtalk.go
index 0a0160ac46..ea35442436 100644
--- a/services/webhook/dingtalk.go
+++ b/services/webhook/dingtalk.go
@@ -17,28 +17,29 @@ import (
 	"code.gitea.io/gitea/modules/util"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type dingtalkHandler struct{}
 
 func (dingtalkHandler) Type() webhook_module.HookType       { return webhook_module.DINGTALK }
 func (dingtalkHandler) Metadata(*webhook_model.Webhook) any { return nil }
-func (dingtalkHandler) Icon(size int) template.HTML         { return imgIcon("dingtalk.ico", size) }
+func (dingtalkHandler) Icon(size int) template.HTML         { return shared.ImgIcon("dingtalk.ico", size) }
 
-func (dingtalkHandler) FormFields(bind func(any)) FormFields {
+func (dingtalkHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		PayloadURL string `binding:"Required;ValidUrl"`
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
-		Metadata:    nil,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
+		Metadata:        nil,
 	}
 }
 
@@ -225,8 +226,8 @@ func createDingtalkPayload(title, text, singleTitle, singleURL string) DingtalkP
 
 type dingtalkConvertor struct{}
 
-var _ payloadConvertor[DingtalkPayload] = dingtalkConvertor{}
+var _ shared.PayloadConvertor[DingtalkPayload] = dingtalkConvertor{}
 
 func (dingtalkHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
-	return newJSONRequest(dingtalkConvertor{}, w, t, true)
+	return shared.NewJSONRequest(dingtalkConvertor{}, w, t, true)
 }
diff --git a/services/webhook/discord.go b/services/webhook/discord.go
index 2efb46f5bb..cb756688c8 100644
--- a/services/webhook/discord.go
+++ b/services/webhook/discord.go
@@ -22,28 +22,29 @@ import (
 	"code.gitea.io/gitea/modules/util"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type discordHandler struct{}
 
 func (discordHandler) Type() webhook_module.HookType { return webhook_module.DISCORD }
-func (discordHandler) Icon(size int) template.HTML   { return imgIcon("discord.png", size) }
+func (discordHandler) Icon(size int) template.HTML   { return shared.ImgIcon("discord.png", size) }
 
-func (discordHandler) FormFields(bind func(any)) FormFields {
+func (discordHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		PayloadURL string `binding:"Required;ValidUrl"`
 		Username   string
 		IconURL    string
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
 		Metadata: &DiscordMeta{
 			Username: form.Username,
 			IconURL:  form.IconURL,
@@ -287,7 +288,7 @@ type discordConvertor struct {
 	AvatarURL string
 }
 
-var _ payloadConvertor[DiscordPayload] = discordConvertor{}
+var _ shared.PayloadConvertor[DiscordPayload] = discordConvertor{}
 
 func (discordHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
 	meta := &DiscordMeta{}
@@ -298,7 +299,7 @@ func (discordHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook,
 		Username:  meta.Username,
 		AvatarURL: meta.IconURL,
 	}
-	return newJSONRequest(sc, w, t, true)
+	return shared.NewJSONRequest(sc, w, t, true)
 }
 
 func parseHookPullRequestEventType(event webhook_module.HookEventType) (string, error) {
diff --git a/services/webhook/feishu.go b/services/webhook/feishu.go
index eba54fa09b..f77c3bbd65 100644
--- a/services/webhook/feishu.go
+++ b/services/webhook/feishu.go
@@ -15,27 +15,28 @@ import (
 	api "code.gitea.io/gitea/modules/structs"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type feishuHandler struct{}
 
 func (feishuHandler) Type() webhook_module.HookType { return webhook_module.FEISHU }
-func (feishuHandler) Icon(size int) template.HTML   { return imgIcon("feishu.png", size) }
+func (feishuHandler) Icon(size int) template.HTML   { return shared.ImgIcon("feishu.png", size) }
 
-func (feishuHandler) FormFields(bind func(any)) FormFields {
+func (feishuHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		PayloadURL string `binding:"Required;ValidUrl"`
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
-		Metadata:    nil,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
+		Metadata:        nil,
 	}
 }
 
@@ -192,8 +193,8 @@ func (fc feishuConvertor) Package(p *api.PackagePayload) (FeishuPayload, error)
 
 type feishuConvertor struct{}
 
-var _ payloadConvertor[FeishuPayload] = feishuConvertor{}
+var _ shared.PayloadConvertor[FeishuPayload] = feishuConvertor{}
 
 func (feishuHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
-	return newJSONRequest(feishuConvertor{}, w, t, true)
+	return shared.NewJSONRequest(feishuConvertor{}, w, t, true)
 }
diff --git a/services/webhook/general.go b/services/webhook/general.go
index 454efc6495..c41f58fe8d 100644
--- a/services/webhook/general.go
+++ b/services/webhook/general.go
@@ -6,9 +6,7 @@ package webhook
 import (
 	"fmt"
 	"html"
-	"html/template"
 	"net/url"
-	"strconv"
 	"strings"
 
 	webhook_model "code.gitea.io/gitea/models/webhook"
@@ -354,9 +352,3 @@ func ToHook(repoLink string, w *webhook_model.Webhook) (*api.Hook, error) {
 		Created:             w.CreatedUnix.AsTime(),
 	}, nil
 }
-
-func imgIcon(name string, size int) template.HTML {
-	s := strconv.Itoa(size)
-	src := html.EscapeString(setting.StaticURLPrefix + "/assets/img/" + name)
-	return template.HTML(`<img width="` + s + `" height="` + s + `" src="` + src + `">`)
-}
diff --git a/services/webhook/gogs.go b/services/webhook/gogs.go
index f616f5e2f3..7dbf64343f 100644
--- a/services/webhook/gogs.go
+++ b/services/webhook/gogs.go
@@ -10,16 +10,17 @@ import (
 	webhook_model "code.gitea.io/gitea/models/webhook"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type gogsHandler struct{ defaultHandler }
 
 func (gogsHandler) Type() webhook_module.HookType { return webhook_module.GOGS }
-func (gogsHandler) Icon(size int) template.HTML   { return imgIcon("gogs.ico", size) }
+func (gogsHandler) Icon(size int) template.HTML   { return shared.ImgIcon("gogs.ico", size) }
 
-func (gogsHandler) FormFields(bind func(any)) FormFields {
+func (gogsHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		PayloadURL  string `binding:"Required;ValidUrl"`
 		ContentType int    `binding:"Required"`
 		Secret      string
@@ -30,12 +31,12 @@ func (gogsHandler) FormFields(bind func(any)) FormFields {
 	if webhook_model.HookContentType(form.ContentType) == webhook_model.ContentTypeForm {
 		contentType = webhook_model.ContentTypeForm
 	}
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: contentType,
-		Secret:      form.Secret,
-		HTTPMethod:  http.MethodPost,
-		Metadata:    nil,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     contentType,
+		Secret:          form.Secret,
+		HTTPMethod:      http.MethodPost,
+		Metadata:        nil,
 	}
 }
diff --git a/services/webhook/matrix.go b/services/webhook/matrix.go
index 322b4d6665..697e33e94c 100644
--- a/services/webhook/matrix.go
+++ b/services/webhook/matrix.go
@@ -25,6 +25,7 @@ import (
 	"code.gitea.io/gitea/modules/util"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type matrixHandler struct{}
@@ -35,25 +36,25 @@ func (matrixHandler) Icon(size int) template.HTML {
 	return svg.RenderHTML("gitea-matrix", size, "img")
 }
 
-func (matrixHandler) FormFields(bind func(any)) FormFields {
+func (matrixHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		HomeserverURL string `binding:"Required;ValidUrl"`
 		RoomID        string `binding:"Required"`
 		MessageType   int
 
 		// enforce requirement of authorization_header
-		// (value will still be set in the embedded WebhookForm)
+		// (value will still be set in the embedded WebhookCoreForm)
 		AuthorizationHeader string `binding:"Required"`
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         fmt.Sprintf("%s/_matrix/client/r0/rooms/%s/send/m.room.message", form.HomeserverURL, url.PathEscape(form.RoomID)),
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPut,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             fmt.Sprintf("%s/_matrix/client/r0/rooms/%s/send/m.room.message", form.HomeserverURL, url.PathEscape(form.RoomID)),
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPut,
 		Metadata: &MatrixMeta{
 			HomeserverURL: form.HomeserverURL,
 			Room:          form.RoomID,
@@ -70,7 +71,7 @@ func (matrixHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t
 	mc := matrixConvertor{
 		MsgType: messageTypeText[meta.MessageType],
 	}
-	payload, err := newPayload(mc, []byte(t.PayloadContent), t.EventType)
+	payload, err := shared.NewPayload(mc, []byte(t.PayloadContent), t.EventType)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -90,7 +91,7 @@ func (matrixHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t
 	}
 	req.Header.Set("Content-Type", "application/json")
 
-	return req, body, addDefaultHeaders(req, []byte(w.Secret), t, body) // likely useless, but has always been sent historially
+	return req, body, shared.AddDefaultHeaders(req, []byte(w.Secret), t, body) // likely useless, but has always been sent historially
 }
 
 const matrixPayloadSizeLimit = 1024 * 64
@@ -125,7 +126,7 @@ type MatrixPayload struct {
 	Commits       []*api.PayloadCommit `json:"io.gitea.commits,omitempty"`
 }
 
-var _ payloadConvertor[MatrixPayload] = matrixConvertor{}
+var _ shared.PayloadConvertor[MatrixPayload] = matrixConvertor{}
 
 type matrixConvertor struct {
 	MsgType string
diff --git a/services/webhook/msteams.go b/services/webhook/msteams.go
index 940a6c49aa..3e9959146b 100644
--- a/services/webhook/msteams.go
+++ b/services/webhook/msteams.go
@@ -17,28 +17,29 @@ import (
 	"code.gitea.io/gitea/modules/util"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type msteamsHandler struct{}
 
 func (msteamsHandler) Type() webhook_module.HookType       { return webhook_module.MSTEAMS }
 func (msteamsHandler) Metadata(*webhook_model.Webhook) any { return nil }
-func (msteamsHandler) Icon(size int) template.HTML         { return imgIcon("msteams.png", size) }
+func (msteamsHandler) Icon(size int) template.HTML         { return shared.ImgIcon("msteams.png", size) }
 
-func (msteamsHandler) FormFields(bind func(any)) FormFields {
+func (msteamsHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		PayloadURL string `binding:"Required;ValidUrl"`
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
-		Metadata:    nil,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
+		Metadata:        nil,
 	}
 }
 
@@ -370,8 +371,8 @@ func createMSTeamsPayload(r *api.Repository, s *api.User, title, text, actionTar
 
 type msteamsConvertor struct{}
 
-var _ payloadConvertor[MSTeamsPayload] = msteamsConvertor{}
+var _ shared.PayloadConvertor[MSTeamsPayload] = msteamsConvertor{}
 
 func (msteamsHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
-	return newJSONRequest(msteamsConvertor{}, w, t, true)
+	return shared.NewJSONRequest(msteamsConvertor{}, w, t, true)
 }
diff --git a/services/webhook/packagist.go b/services/webhook/packagist.go
index f1f3306109..9831a4e008 100644
--- a/services/webhook/packagist.go
+++ b/services/webhook/packagist.go
@@ -15,28 +15,29 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type packagistHandler struct{}
 
 func (packagistHandler) Type() webhook_module.HookType { return webhook_module.PACKAGIST }
-func (packagistHandler) Icon(size int) template.HTML   { return imgIcon("packagist.png", size) }
+func (packagistHandler) Icon(size int) template.HTML   { return shared.ImgIcon("packagist.png", size) }
 
-func (packagistHandler) FormFields(bind func(any)) FormFields {
+func (packagistHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		Username   string `binding:"Required"`
 		APIToken   string `binding:"Required"`
 		PackageURL string `binding:"Required;ValidUrl"`
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         fmt.Sprintf("https://packagist.org/api/update-package?username=%s&apiToken=%s", url.QueryEscape(form.Username), url.QueryEscape(form.APIToken)),
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             fmt.Sprintf("https://packagist.org/api/update-package?username=%s&apiToken=%s", url.QueryEscape(form.Username), url.QueryEscape(form.APIToken)),
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
 		Metadata: &PackagistMeta{
 			Username:   form.Username,
 			APIToken:   form.APIToken,
@@ -85,5 +86,5 @@ func (packagistHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook
 			URL: meta.PackageURL,
 		},
 	}
-	return newJSONRequestWithPayload(payload, w, t, false)
+	return shared.NewJSONRequestWithPayload(payload, w, t, false)
 }
diff --git a/services/webhook/shared/img.go b/services/webhook/shared/img.go
new file mode 100644
index 0000000000..2d65ba4e0f
--- /dev/null
+++ b/services/webhook/shared/img.go
@@ -0,0 +1,15 @@
+package shared
+
+import (
+	"html"
+	"html/template"
+	"strconv"
+
+	"code.gitea.io/gitea/modules/setting"
+)
+
+func ImgIcon(name string, size int) template.HTML {
+	s := strconv.Itoa(size)
+	src := html.EscapeString(setting.StaticURLPrefix + "/assets/img/" + name)
+	return template.HTML(`<img width="` + s + `" height="` + s + `" src="` + src + `">`)
+}
diff --git a/services/webhook/payloader.go b/services/webhook/shared/payloader.go
similarity index 65%
rename from services/webhook/payloader.go
rename to services/webhook/shared/payloader.go
index f87e6e4eec..da7424dc20 100644
--- a/services/webhook/payloader.go
+++ b/services/webhook/shared/payloader.go
@@ -1,11 +1,16 @@
 // Copyright 2020 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
-package webhook
+package shared
 
 import (
 	"bytes"
+	"crypto/hmac"
+	"crypto/sha1"
+	"crypto/sha256"
+	"encoding/hex"
 	"fmt"
+	"io"
 	"net/http"
 
 	webhook_model "code.gitea.io/gitea/models/webhook"
@@ -14,8 +19,8 @@ import (
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 )
 
-// payloadConvertor defines the interface to convert system payload to webhook payload
-type payloadConvertor[T any] interface {
+// PayloadConvertor defines the interface to convert system payload to webhook payload
+type PayloadConvertor[T any] interface {
 	Create(*api.CreatePayload) (T, error)
 	Delete(*api.DeletePayload) (T, error)
 	Fork(*api.ForkPayload) (T, error)
@@ -39,7 +44,7 @@ func convertUnmarshalledJSON[T, P any](convert func(P) (T, error), data []byte)
 	return convert(p)
 }
 
-func newPayload[T any](rc payloadConvertor[T], data []byte, event webhook_module.HookEventType) (T, error) {
+func NewPayload[T any](rc PayloadConvertor[T], data []byte, event webhook_module.HookEventType) (T, error) {
 	switch event {
 	case webhook_module.HookEventCreate:
 		return convertUnmarshalledJSON(rc.Create, data)
@@ -83,15 +88,15 @@ func newPayload[T any](rc payloadConvertor[T], data []byte, event webhook_module
 	return t, fmt.Errorf("newPayload unsupported event: %s", event)
 }
 
-func newJSONRequest[T any](pc payloadConvertor[T], w *webhook_model.Webhook, t *webhook_model.HookTask, withDefaultHeaders bool) (*http.Request, []byte, error) {
-	payload, err := newPayload(pc, []byte(t.PayloadContent), t.EventType)
+func NewJSONRequest[T any](pc PayloadConvertor[T], w *webhook_model.Webhook, t *webhook_model.HookTask, withDefaultHeaders bool) (*http.Request, []byte, error) {
+	payload, err := NewPayload(pc, []byte(t.PayloadContent), t.EventType)
 	if err != nil {
 		return nil, nil, err
 	}
-	return newJSONRequestWithPayload(payload, w, t, withDefaultHeaders)
+	return NewJSONRequestWithPayload(payload, w, t, withDefaultHeaders)
 }
 
-func newJSONRequestWithPayload(payload any, w *webhook_model.Webhook, t *webhook_model.HookTask, withDefaultHeaders bool) (*http.Request, []byte, error) {
+func NewJSONRequestWithPayload(payload any, w *webhook_model.Webhook, t *webhook_model.HookTask, withDefaultHeaders bool) (*http.Request, []byte, error) {
 	body, err := json.MarshalIndent(payload, "", "  ")
 	if err != nil {
 		return nil, nil, err
@@ -109,7 +114,45 @@ func newJSONRequestWithPayload(payload any, w *webhook_model.Webhook, t *webhook
 	req.Header.Set("Content-Type", "application/json")
 
 	if withDefaultHeaders {
-		return req, body, addDefaultHeaders(req, []byte(w.Secret), t, body)
+		return req, body, AddDefaultHeaders(req, []byte(w.Secret), t, body)
 	}
 	return req, body, nil
 }
+
+// AddDefaultHeaders adds the X-Forgejo, X-Gitea, X-Gogs, X-Hub, X-GitHub headers to the given request
+func AddDefaultHeaders(req *http.Request, secret []byte, t *webhook_model.HookTask, payloadContent []byte) error {
+	var signatureSHA1 string
+	var signatureSHA256 string
+	if len(secret) > 0 {
+		sig1 := hmac.New(sha1.New, secret)
+		sig256 := hmac.New(sha256.New, secret)
+		_, err := io.MultiWriter(sig1, sig256).Write(payloadContent)
+		if err != nil {
+			// this error should never happen, since the hashes are writing to []byte and always return a nil error.
+			return fmt.Errorf("prepareWebhooks.sigWrite: %w", err)
+		}
+		signatureSHA1 = hex.EncodeToString(sig1.Sum(nil))
+		signatureSHA256 = hex.EncodeToString(sig256.Sum(nil))
+	}
+
+	event := t.EventType.Event()
+	eventType := string(t.EventType)
+	req.Header.Add("X-Forgejo-Delivery", t.UUID)
+	req.Header.Add("X-Forgejo-Event", event)
+	req.Header.Add("X-Forgejo-Event-Type", eventType)
+	req.Header.Add("X-Forgejo-Signature", signatureSHA256)
+	req.Header.Add("X-Gitea-Delivery", t.UUID)
+	req.Header.Add("X-Gitea-Event", event)
+	req.Header.Add("X-Gitea-Event-Type", eventType)
+	req.Header.Add("X-Gitea-Signature", signatureSHA256)
+	req.Header.Add("X-Gogs-Delivery", t.UUID)
+	req.Header.Add("X-Gogs-Event", event)
+	req.Header.Add("X-Gogs-Event-Type", eventType)
+	req.Header.Add("X-Gogs-Signature", signatureSHA256)
+	req.Header.Add("X-Hub-Signature", "sha1="+signatureSHA1)
+	req.Header.Add("X-Hub-Signature-256", "sha256="+signatureSHA256)
+	req.Header["X-GitHub-Delivery"] = []string{t.UUID}
+	req.Header["X-GitHub-Event"] = []string{event}
+	req.Header["X-GitHub-Event-Type"] = []string{eventType}
+	return nil
+}
diff --git a/services/webhook/slack.go b/services/webhook/slack.go
index 0b4c4b6645..c835d59984 100644
--- a/services/webhook/slack.go
+++ b/services/webhook/slack.go
@@ -20,6 +20,7 @@ import (
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	gitea_context "code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 
 	"gitea.com/go-chi/binding"
 )
@@ -27,10 +28,10 @@ import (
 type slackHandler struct{}
 
 func (slackHandler) Type() webhook_module.HookType { return webhook_module.SLACK }
-func (slackHandler) Icon(size int) template.HTML   { return imgIcon("slack.png", size) }
+func (slackHandler) Icon(size int) template.HTML   { return shared.ImgIcon("slack.png", size) }
 
 type slackForm struct {
-	forms.WebhookForm
+	forms.WebhookCoreForm
 	PayloadURL string `binding:"Required;ValidUrl"`
 	Channel    string `binding:"Required"`
 	Username   string
@@ -53,16 +54,16 @@ func (s *slackForm) Validate(req *http.Request, errs binding.Errors) binding.Err
 	return errs
 }
 
-func (slackHandler) FormFields(bind func(any)) FormFields {
+func (slackHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form slackForm
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
 		Metadata: &SlackMeta{
 			Channel:  strings.TrimSpace(form.Channel),
 			Username: form.Username,
@@ -334,7 +335,7 @@ type slackConvertor struct {
 	Color    string
 }
 
-var _ payloadConvertor[SlackPayload] = slackConvertor{}
+var _ shared.PayloadConvertor[SlackPayload] = slackConvertor{}
 
 func (slackHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
 	meta := &SlackMeta{}
@@ -347,7 +348,7 @@ func (slackHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t
 		IconURL:  meta.IconURL,
 		Color:    meta.Color,
 	}
-	return newJSONRequest(sc, w, t, true)
+	return shared.NewJSONRequest(sc, w, t, true)
 }
 
 var slackChannel = regexp.MustCompile(`^#?[a-z0-9_-]{1,80}$`)
diff --git a/services/webhook/telegram.go b/services/webhook/telegram.go
index daa986bafb..724c41012f 100644
--- a/services/webhook/telegram.go
+++ b/services/webhook/telegram.go
@@ -18,28 +18,29 @@ import (
 	api "code.gitea.io/gitea/modules/structs"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type telegramHandler struct{}
 
 func (telegramHandler) Type() webhook_module.HookType { return webhook_module.TELEGRAM }
-func (telegramHandler) Icon(size int) template.HTML   { return imgIcon("telegram.png", size) }
+func (telegramHandler) Icon(size int) template.HTML   { return shared.ImgIcon("telegram.png", size) }
 
-func (telegramHandler) FormFields(bind func(any)) FormFields {
+func (telegramHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		BotToken string `binding:"Required"`
 		ChatID   string `binding:"Required"`
 		ThreadID string
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         fmt.Sprintf("https://api.telegram.org/bot%s/sendMessage?chat_id=%s&message_thread_id=%s", url.PathEscape(form.BotToken), url.QueryEscape(form.ChatID), url.QueryEscape(form.ThreadID)),
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             fmt.Sprintf("https://api.telegram.org/bot%s/sendMessage?chat_id=%s&message_thread_id=%s", url.PathEscape(form.BotToken), url.QueryEscape(form.ChatID), url.QueryEscape(form.ThreadID)),
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
 		Metadata: &TelegramMeta{
 			BotToken: form.BotToken,
 			ChatID:   form.ChatID,
@@ -220,8 +221,8 @@ func createTelegramPayload(message string) TelegramPayload {
 
 type telegramConvertor struct{}
 
-var _ payloadConvertor[TelegramPayload] = telegramConvertor{}
+var _ shared.PayloadConvertor[TelegramPayload] = telegramConvertor{}
 
 func (telegramHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
-	return newJSONRequest(telegramConvertor{}, w, t, true)
+	return shared.NewJSONRequest(telegramConvertor{}, w, t, true)
 }
diff --git a/services/webhook/webhook.go b/services/webhook/webhook.go
index f27bffc29a..75962db605 100644
--- a/services/webhook/webhook.go
+++ b/services/webhook/webhook.go
@@ -32,22 +32,13 @@ import (
 type Handler interface {
 	Type() webhook_module.HookType
 	Metadata(*webhook_model.Webhook) any
-	// FormFields provides a function to bind the request to the form.
+	// UnmarshalForm provides a function to bind the request to the form.
 	// If form implements the [binding.Validator] interface, the Validate method will be called
-	FormFields(bind func(form any)) FormFields
+	UnmarshalForm(bind func(form any)) forms.WebhookForm
 	NewRequest(context.Context, *webhook_model.Webhook, *webhook_model.HookTask) (req *http.Request, body []byte, err error)
 	Icon(size int) template.HTML
 }
 
-type FormFields struct {
-	forms.WebhookForm
-	URL         string
-	ContentType webhook_model.HookContentType
-	Secret      string
-	HTTPMethod  string
-	Metadata    any
-}
-
 var webhookHandlers = []Handler{
 	defaultHandler{true},
 	defaultHandler{false},
diff --git a/services/webhook/wechatwork.go b/services/webhook/wechatwork.go
index eff5b9b526..0329cff122 100644
--- a/services/webhook/wechatwork.go
+++ b/services/webhook/wechatwork.go
@@ -15,6 +15,7 @@ import (
 	api "code.gitea.io/gitea/modules/structs"
 	webhook_module "code.gitea.io/gitea/modules/webhook"
 	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/webhook/shared"
 )
 
 type wechatworkHandler struct{}
@@ -23,23 +24,23 @@ func (wechatworkHandler) Type() webhook_module.HookType       { return webhook_m
 func (wechatworkHandler) Metadata(*webhook_model.Webhook) any { return nil }
 
 func (wechatworkHandler) Icon(size int) template.HTML {
-	return imgIcon("wechatwork.png", size)
+	return shared.ImgIcon("wechatwork.png", size)
 }
 
-func (wechatworkHandler) FormFields(bind func(any)) FormFields {
+func (wechatworkHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
 	var form struct {
-		forms.WebhookForm
+		forms.WebhookCoreForm
 		PayloadURL string `binding:"Required;ValidUrl"`
 	}
 	bind(&form)
 
-	return FormFields{
-		WebhookForm: form.WebhookForm,
-		URL:         form.PayloadURL,
-		ContentType: webhook_model.ContentTypeJSON,
-		Secret:      "",
-		HTTPMethod:  http.MethodPost,
-		Metadata:    nil,
+	return forms.WebhookForm{
+		WebhookCoreForm: form.WebhookCoreForm,
+		URL:             form.PayloadURL,
+		ContentType:     webhook_model.ContentTypeJSON,
+		Secret:          "",
+		HTTPMethod:      http.MethodPost,
+		Metadata:        nil,
 	}
 }
 
@@ -203,8 +204,8 @@ func (wc wechatworkConvertor) Package(p *api.PackagePayload) (WechatworkPayload,
 
 type wechatworkConvertor struct{}
 
-var _ payloadConvertor[WechatworkPayload] = wechatworkConvertor{}
+var _ shared.PayloadConvertor[WechatworkPayload] = wechatworkConvertor{}
 
 func (wechatworkHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
-	return newJSONRequest(wechatworkConvertor{}, w, t, true)
+	return shared.NewJSONRequest(wechatworkConvertor{}, w, t, true)
 }