diff --git a/release-notes/9.0.0/fix/4427.md b/release-notes/9.0.0/fix/4427.md
new file mode 100644
index 0000000000..3556a8f13d
--- /dev/null
+++ b/release-notes/9.0.0/fix/4427.md
@@ -0,0 +1 @@
+Fixed social media previews for links to wiki pages.
diff --git a/templates/base/head_opengraph.tmpl b/templates/base/head_opengraph.tmpl
index c02adabaab..292c3bdd92 100644
--- a/templates/base/head_opengraph.tmpl
+++ b/templates/base/head_opengraph.tmpl
@@ -24,6 +24,12 @@
{{- end -}}
{{end}}
+ {{else if .Pages}}
+
+
+ {{if .Repository.Description}}
+
+ {{end}}
{{else}}
diff --git a/tests/integration/opengraph_test.go b/tests/integration/opengraph_test.go
new file mode 100644
index 0000000000..8d29e4548d
--- /dev/null
+++ b/tests/integration/opengraph_test.go
@@ -0,0 +1,150 @@
+// Copyright 2024 The Forgejo Authors c/o Codeberg e.V.. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+ "net/http"
+ "testing"
+
+ "code.gitea.io/gitea/modules/setting"
+ "code.gitea.io/gitea/tests"
+
+ "github.com/PuerkitoBio/goquery"
+ "github.com/stretchr/testify/assert"
+)
+
+func TestOpenGraphProperties(t *testing.T) {
+ defer tests.PrepareTestEnv(t)()
+ siteName := "Forgejo: Beyond coding. We Forge."
+
+ cases := []struct {
+ name string
+ url string
+ expected map[string]string
+ }{
+ {
+ name: "website root",
+ url: "/",
+ expected: map[string]string{
+ "og:title": siteName,
+ "og:url": setting.AppURL,
+ "og:description": "Forgejo is a self-hosted lightweight software forge. Easy to install and low maintenance, it just does the job.",
+ "og:type": "website",
+ "og:image": "/assets/img/logo.png",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "profile page without description",
+ url: "/user30",
+ expected: map[string]string{
+ "og:title": "User Thirty",
+ "og:url": setting.AppURL + "user30",
+ "og:type": "profile",
+ "og:image": "https://secure.gravatar.com/avatar/eae1f44b34ff27284cb0792c7601c89c?d=identicon",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "profile page with description",
+ url: "/the_34-user.with.all.allowedchars",
+ expected: map[string]string{
+ "og:title": "the_1-user.with.all.allowedChars",
+ "og:url": setting.AppURL + "the_34-user.with.all.allowedChars",
+ "og:description": "some [commonmark](https://commonmark.org/)!",
+ "og:type": "profile",
+ "og:image": setting.AppURL + "avatars/avatar34",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "issue",
+ url: "/user2/repo1/issues/1",
+ expected: map[string]string{
+ "og:title": "issue1",
+ "og:url": setting.AppURL + "user2/repo1/issues/1",
+ "og:description": "content for the first issue",
+ "og:type": "object",
+ "og:image": "https://secure.gravatar.com/avatar/ab53a2911ddf9b4817ac01ddcd3d975f?d=identicon",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "pull request",
+ url: "/user2/repo1/pulls/2",
+ expected: map[string]string{
+ "og:title": "issue2",
+ "og:url": setting.AppURL + "user2/repo1/pulls/2",
+ "og:description": "content for the second issue",
+ "og:type": "object",
+ "og:image": "https://secure.gravatar.com/avatar/ab53a2911ddf9b4817ac01ddcd3d975f?d=identicon",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "file in repo",
+ url: "/user27/repo49/src/branch/master/test/test.txt",
+ expected: map[string]string{
+ "og:title": "repo49/test/test.txt at master",
+ "og:url": setting.AppURL + "/user27/repo49/src/branch/master/test/test.txt",
+ "og:type": "object",
+ "og:image": "https://secure.gravatar.com/avatar/7095710e927665f1bdd1ced94152f232?d=identicon",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "wiki page for repo without description",
+ url: "/user2/repo1/wiki/Page-With-Spaced-Name",
+ expected: map[string]string{
+ "og:title": "Page With Spaced Name",
+ "og:url": setting.AppURL + "/user2/repo1/wiki/Page-With-Spaced-Name",
+ "og:type": "object",
+ "og:image": "https://secure.gravatar.com/avatar/ab53a2911ddf9b4817ac01ddcd3d975f?d=identicon",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "index page for repo without description",
+ url: "/user2/repo1",
+ expected: map[string]string{
+ "og:title": "repo1",
+ "og:url": setting.AppURL + "user2/repo1",
+ "og:type": "object",
+ "og:image": "https://secure.gravatar.com/avatar/ab53a2911ddf9b4817ac01ddcd3d975f?d=identicon",
+ "og:site_name": siteName,
+ },
+ },
+ {
+ name: "index page for repo with description",
+ url: "/user27/repo49",
+ expected: map[string]string{
+ "og:title": "repo49",
+ "og:url": setting.AppURL + "user27/repo49",
+ "og:description": "A wonderful repository with more than just a README.md",
+ "og:type": "object",
+ "og:image": "https://secure.gravatar.com/avatar/7095710e927665f1bdd1ced94152f232?d=identicon",
+ "og:site_name": siteName,
+ },
+ },
+ }
+
+ for _, tc := range cases {
+ t.Run(tc.name, func(t *testing.T) {
+ req := NewRequest(t, "GET", tc.url)
+ resp := MakeRequest(t, req, http.StatusOK)
+ doc := NewHTMLParser(t, resp.Body)
+
+ foundProps := make(map[string]string)
+ doc.Find("head meta[property^=\"og:\"]").Each(func(_ int, selection *goquery.Selection) {
+ prop, foundProp := selection.Attr("property")
+ assert.True(t, foundProp)
+ content, foundContent := selection.Attr("content")
+ assert.True(t, foundContent, "opengraph meta tag without a content property")
+ foundProps[prop] = content
+ })
+
+ assert.EqualValues(t, tc.expected, foundProps, "mismatching opengraph properties")
+ })
+ }
+}