diff --git a/addons/website_forum/controllers/website_forum.py b/addons/website_forum/controllers/website_forum.py
index 994939bbcc1..0ce1ff935ed 100644
--- a/addons/website_forum/controllers/website_forum.py
+++ b/addons/website_forum/controllers/website_forum.py
@@ -36,6 +36,21 @@ class WebsiteForum(WebsiteProfile):
             values['forum'] = kwargs.get('forum')
         elif kwargs.get('forum_id'):
             values['forum'] = request.env['forum.forum'].browse(int(kwargs.pop('forum_id')))
+        forum = values.get('forum')
+        if forum and forum is not True and not request.env.user._is_public():
+            def _get_my_other_forums():
+                post_domain = expression.OR(
+                    [[('create_uid', '=', request.uid)],
+                     [('favourite_ids', '=', request.uid)]]
+                )
+                return request.env['forum.forum'].search(expression.AND([
+                    request.website.website_domain(),
+                    [('id', '!=', forum.id)],
+                    [('post_ids', 'any', post_domain)]
+                ]))
+            values['my_other_forums'] = tools.lazy(_get_my_other_forums)
+        else:
+            values['my_other_forums'] = request.env['forum.forum']
         return values
 
     def _prepare_mark_as_offensive_values(self, post, **kwargs):
diff --git a/addons/website_forum/tests/__init__.py b/addons/website_forum/tests/__init__.py
index 19b53cb2ec1..eb576b9e6b9 100644
--- a/addons/website_forum/tests/__init__.py
+++ b/addons/website_forum/tests/__init__.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from . import common
+from . import test_forum_controller
 from . import test_forum_internals
 from . import test_forum_karma_access
 from . import test_forum_tag
diff --git a/addons/website_forum/tests/common.py b/addons/website_forum/tests/common.py
index a53fba76075..268b13f136a 100644
--- a/addons/website_forum/tests/common.py
+++ b/addons/website_forum/tests/common.py
@@ -44,6 +44,13 @@ class TestForumCommon(common.TransactionCase):
             'karma': 0,
             'groups_id': [(6, 0, [group_employee_id])]
         })
+        cls.user_employee_2 = cls.env['res.users'].create({
+            'name': 'Merlin Employee',
+            'login': 'Merlin',
+            'email': 'merlin.employee@example.com',
+            'karma': KARMA['ask'],
+            'groups_id': [(6, 0, [cls.env.ref('base.group_user').id])],
+        })
         cls.user_portal = TestUsersEnv.create({
             'name': 'Beatrice Portal',
             'login': 'Beatrice',
@@ -58,6 +65,7 @@ class TestForumCommon(common.TransactionCase):
             'karma': 0,
             'groups_id': [(6, 0, [group_public_id])]
         })
+        cls.user_admin = cls.env.ref('base.user_admin')
 
         # Test forum
         cls.forum = Forum.create({
diff --git a/addons/website_forum/tests/test_forum_controller.py b/addons/website_forum/tests/test_forum_controller.py
new file mode 100644
index 00000000000..72a8ab56f77
--- /dev/null
+++ b/addons/website_forum/tests/test_forum_controller.py
@@ -0,0 +1,63 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo.addons.website.tools import MockRequest
+from odoo.addons.website_forum.controllers.website_forum import WebsiteForum
+from odoo.addons.website_forum.tests.common import KARMA, TestForumCommon
+
+
+class TestForumController(TestForumCommon):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls._activate_multi_website()
+        cls.minimum_karma_allowing_to_post = KARMA['ask']
+        cls.forums = cls.env['forum.forum'].create([{
+            'name': f'Forum {idx + 2}',
+            'karma_ask': cls.minimum_karma_allowing_to_post,
+            'website_id': website.id,
+        } for idx, website in enumerate(
+            (cls.base_website, cls.base_website, cls.base_website, cls.website_2, cls.website_2))])
+        cls.forum_1, cls.forum_2, cls.forum_3, cls.forum_1_website_2, cls.forum_2_website_2 = cls.forums
+        cls.controller = WebsiteForum()
+
+    def _get_my_other_forums(self, forum):
+        """ Get user other forums limited to the forums of the test (self.forums). """
+        return self.forums & self.controller._prepare_user_values(forum=forum).get('my_other_forums')
+
+    def forum_post(self, user, forum):
+        return self.env['forum.post'].with_user(user).create({
+            'content': 'A post ...',
+            'forum_id': forum.id,
+            'name': 'Post...',
+        })
+
+    def test_prepare_user_values_my_other_forum(self):
+        """ Test user other forums values (my_other_forums) in various contexts. """
+        employee_2_forum_2_post = self.forum_post(self.user_employee_2, self.forum_2)
+        employee_2_website_2_forum_2_post = self.forum_post(self.user_employee_2, self.forum_2_website_2)
+        for user in (self.user_admin, self.user_employee, self.user_portal, self.user_public):
+            with self.with_user(user.login), MockRequest(self.env, website=self.base_website):
+                self.assertFalse(self._get_my_other_forums(self.forum_1))
+                self.assertFalse(self._get_my_other_forums(None))
+                self.assertFalse(self._get_my_other_forums(True))
+                if user != self.user_public:
+                    self.env.user.karma = self.minimum_karma_allowing_to_post
+                    # Like a post on forum 2 and verify that forum 2 is now in "my other forum"
+                    employee_2_forum_2_post.favourite_ids += self.env.user
+                    self.assertEqual(self._get_my_other_forums(self.forum_1), self.forum_2)
+                    self.assertFalse(self._get_my_other_forums(self.forum_2))
+                    # Check similarly with posting and also checking that we don't see forum of website 2
+                    self.forum_post(self.env.user, self.forum_3)
+                    self.forum_post(self.env.user, self.forum_1_website_2)
+                    self.assertEqual(self._get_my_other_forums(self.forum_1), self.forum_2 + self.forum_3)
+                    self.assertEqual(self._get_my_other_forums(self.forum_2), self.forum_3)
+                    self.assertEqual(self._get_my_other_forums(self.forum_3), self.forum_2)
+            with self.with_user(user.login), MockRequest(self.env, website=self.website_2):
+                self.assertFalse(self._get_my_other_forums(None))
+                self.assertFalse(self._get_my_other_forums(True))
+                if user != self.user_public:
+                    self.assertFalse(self._get_my_other_forums(self.forum_1_website_2))
+                    self.assertEqual(self._get_my_other_forums(self.forum_2_website_2), self.forum_1_website_2)
+                    employee_2_website_2_forum_2_post.favourite_ids += self.env.user
+                    self.assertEqual(self._get_my_other_forums(self.forum_1_website_2), self.forum_2_website_2)
diff --git a/addons/website_forum/views/forum_forum_templates_layout.xml b/addons/website_forum/views/forum_forum_templates_layout.xml
index 6a9d5860150..bb3f061a5c9 100644
--- a/addons/website_forum/views/forum_forum_templates_layout.xml
+++ b/addons/website_forum/views/forum_forum_templates_layout.xml
@@ -338,6 +338,15 @@
             <t t-out="tag.name"/>
         </a>
     </div>
+    <div t-if="my_other_forums" class="o_wforum_sidebar_section pt-3">
+        <div class="px-3 pb-1 fw-bold">My forums</div>
+        <t t-foreach="my_other_forums.sorted(lambda f: f.name.casefold())" t-as="my_forum">
+            <a class="nav-link my-1 py-1 text-reset" t-attf-href="/forum/#{slug(my_forum)}">
+                <i class="fa fa-file-o fa-fw opacity-50"/>
+                <t t-out="my_forum.name"/>
+            </a>
+        </t>
+    </div>
 </template>
 
 <template id="header_welcome_message" inherit_id="website_forum.header" name="Forum Welcome Message (oe_structure_forum_top)">