diff --git a/addons/website_forum/controllers/website_forum.py b/addons/website_forum/controllers/website_forum.py
index 3273b2cfcf9..8a5ffe4086d 100644
--- a/addons/website_forum/controllers/website_forum.py
+++ b/addons/website_forum/controllers/website_forum.py
@@ -335,8 +335,7 @@ class WebsiteForum(WebsiteProfile):
             })
 
         post_tag_ids = forum._tag_to_write_vals(post.get('post_tags', ''))
-
-        if request.env.user.forum_waiting_posts_count:
+        if forum.has_pending_post:
             return request.redirect("/forum/%s/ask" % slug(forum))
 
         new_question = request.env['forum.post'].create({
diff --git a/addons/website_forum/models/forum_forum.py b/addons/website_forum/models/forum_forum.py
index 178d926e2f2..0f1fe1a1a51 100644
--- a/addons/website_forum/models/forum_forum.py
+++ b/addons/website_forum/models/forum_forum.py
@@ -130,6 +130,21 @@ class Forum(models.Model):
     karma_user_bio = fields.Integer(string='Display detailed user biography', default=750)
     karma_post = fields.Integer(string='Ask questions without validation', default=100)
     karma_moderate = fields.Integer(string='Moderate posts', default=1000)
+    has_pending_post = fields.Boolean(string='Has pending post', compute='_compute_has_pending_post')
+
+    @api.depends_context('uid')
+    def _compute_has_pending_post(self):
+        domain = [
+            ('create_uid', '=', self.env.user.id),
+            ('state', '=', 'pending'),
+            ('parent_id', '=', False),
+        ]
+        pending_forums = self.env['forum.forum'].search([
+            ('id', 'in', self.ids),
+            ('post_ids', 'any', domain),
+        ])
+        pending_forums.has_pending_post = True
+        (self - pending_forums).has_pending_post = False
 
     @api.depends('description')
     def _compute_teaser(self):
diff --git a/addons/website_forum/models/res_users.py b/addons/website_forum/models/res_users.py
index 287f3e45b6e..b246e85f31d 100644
--- a/addons/website_forum/models/res_users.py
+++ b/addons/website_forum/models/res_users.py
@@ -8,21 +8,6 @@ class Users(models.Model):
     _inherit = 'res.users'
 
     create_date = fields.Datetime('Create Date', readonly=True, index=True)
-    forum_waiting_posts_count = fields.Integer(
-        'Waiting post', compute="_compute_forum_waiting_posts_count")
-
-    def _compute_forum_waiting_posts_count(self):
-        read_group_res = self.env['forum.post']._read_group(
-            [('create_uid', 'in', self.ids), ('state', '=', 'pending'), ('parent_id', '=', False)],
-            ['create_uid'],
-            ['__count'],
-        )
-        mapping = {
-            create_uid.id: count
-            for create_uid, count in read_group_res
-        }
-        for user in self:
-            user.forum_waiting_posts_count = mapping.get(user.id, 0)
 
     # Wrapper for call_kw with inherits
     def open_website_url(self):
diff --git a/addons/website_forum/views/forum_forum_templates.xml b/addons/website_forum/views/forum_forum_templates.xml
index 6367319f15c..1a1b31b5c21 100644
--- a/addons/website_forum/views/forum_forum_templates.xml
+++ b/addons/website_forum/views/forum_forum_templates.xml
@@ -30,7 +30,7 @@
                         <a t-att-href="url_for('/forum') + '/' + slug(forum) + '?' + keep_query( 'search', 'sorting', 'filters', 'my')" class="btn py-1">&#215;</a>
                     </span>
                 </div>
-                <div t-if="uid and request.env.user.forum_waiting_posts_count"
+                <div t-if="uid and forum and forum.has_pending_post"
                     title="You already have a pending post"
                     data-bs-toggle="popover" data-bs-trigger="hover" data-bs-content="Please wait for a moderator to validate your previous post before continuing.">
                     <a class="disabled btn btn-secondary btn-block mb-3 mb-md-0" t-attf-href="/forum/#{slug(forum)}/ask">New Post</a>
@@ -188,7 +188,7 @@
 <!-- Edition: ask your question -->
 <template id="new_question" name="New Post">
     <t t-call="website_forum.header">
-        <div t-if="request.env.user.forum_waiting_posts_count" class="alert border" role="alert">
+        <div t-if="forum and forum.has_pending_post" class="alert border" role="alert">
             <b>You already have a pending post.</b><br/>
             <p>Please wait for a moderator to validate your previous post before continuing.</p>
             <a t-attf-href="/forum/#{ slug(forum) }" title="All Topics"><i class="oi oi-chevron-left me-2"/>Back to All Topics</a>
diff --git a/addons/website_forum/views/forum_forum_templates_post.xml b/addons/website_forum/views/forum_forum_templates_post.xml
index 5d0868f4955..76df258617b 100644
--- a/addons/website_forum/views/forum_forum_templates_post.xml
+++ b/addons/website_forum/views/forum_forum_templates_post.xml
@@ -293,11 +293,11 @@
                     </a>
                 </div>
 
-                <t t-if="question.state != 'close' and question.active != False and question.can_answer and not request.env.user.forum_waiting_posts_count">
+                <t t-if="question.state != 'close' and question.active != False and question.can_answer and forum and not forum.has_pending_post">
                     <div id="post_reply" class="collapse answer_collapse" t-if="(not question.uid_has_answered or question.forum_id.mode == 'discussions')">
                         <t t-call="website_forum.post_answer"/>
                     </div>
-                    <div t-elif="uid and request.env.user.forum_waiting_posts_count" class="alert alert-info text-center">
+                    <div t-elif="uid and has_pending_post" class="alert alert-info text-center">
                         <b class="d-block">You have a pending post</b>
                         Please wait for a moderator to validate your previous post to be allowed replying questions.
                     </div>