diff --git a/core/classes/Core/Validate.php b/core/classes/Core/Validate.php
index 29dbf0572c..b8439ac303 100644
--- a/core/classes/Core/Validate.php
+++ b/core/classes/Core/Validate.php
@@ -96,6 +96,11 @@ class Validate {
      */
     public const NOT_START_WITH = 'not_start_with';
 
+    /**
+     * @var string Check that the value does not contain a pattern
+     */
+    public const NOT_CONTAIN = 'not_contain';
+
     /**
      * @var string Set a rate limit
      */
@@ -365,6 +370,24 @@ public static function check(array $source, array $items = []): Validate {
                         }
                         break;
 
+                    case self::NOT_CONTAIN:
+                        if (!is_array($rule_value)) {
+                            $rule_value = [$rule_value];
+                        }
+
+                        foreach ($rule_value as $term) {
+                            if (strpos(strtolower($value), strtolower($term)) !== false) {
+                                $validator->addError([
+                                    'field' => $item,
+                                    'rule' => self::NOT_CONTAIN,
+                                    'fallback' => "$item must not contain $term",
+                                ]);
+                                break;
+                            }
+                        }
+
+                        break;
+
                     case self::IN:
                         $values = is_string($rule_value) ? [$rule_value] : $rule_value;
                         if (!in_array($value, $values)) {
diff --git a/custom/panel_templates/Default/forum/forums_settings.tpl b/custom/panel_templates/Default/forum/forums_settings.tpl
index a7262cd3b4..cbb5b18269 100644
--- a/custom/panel_templates/Default/forum/forums_settings.tpl
+++ b/custom/panel_templates/Default/forum/forums_settings.tpl
@@ -67,6 +67,18 @@
                                     </label>
                                 </div>
 
+                                <div class="form-group">
+                                    <label for="InputBannedTerms">
+                                        {$BANNED_TERMS}
+                                    </label>
+                                    <span class="badge badge-info">
+                                        <i class="fas fa-question-circle" data-container="body" data-toggle="popover"
+                                           data-placement="top" title="{$INFO}"
+                                           data-content="{$BANNED_TERMS_INFO}"></i>
+                                    </span>
+                                    <textarea id="InputBannedTerms" class="form-control" name="banned_terms">{$BANNED_TERMS_VALUE}</textarea>
+                                </div>
+
                                 <div class="form-group">
                                     <input type="hidden" name="token" value="{$TOKEN}">
                                     <input type="submit" class="btn btn-primary" value="{$SUBMIT}" />
diff --git a/modules/Forum/classes/Forum.php b/modules/Forum/classes/Forum.php
index 7cdf4a57ef..6fd4c24b03 100644
--- a/modules/Forum/classes/Forum.php
+++ b/modules/Forum/classes/Forum.php
@@ -798,6 +798,16 @@ public static function getAccessibleLabels(array $labels, array $user_groups): a
         }, []);
     }
 
+    /**
+     * Get banned terms from the Forum module
+     *
+     * @return array Array of banned terms
+     */
+    public static function getBannedTerms(): array {
+        $terms = Settings::get('banned_terms', '', 'forum');
+        return explode("\n", $terms);
+    }
+
     /**
      * Get the latest post in a "View own topic" forum
      * This could be a topic created by the user, or a sticky topic
diff --git a/modules/Forum/language/en_UK.json b/modules/Forum/language/en_UK.json
index 4eca0ffc7f..6cfb603190 100644
--- a/modules/Forum/language/en_UK.json
+++ b/modules/Forum/language/en_UK.json
@@ -3,6 +3,8 @@
     "forum/available_hooks": "Available Hooks",
     "forum/average_posts": "Average user post count",
     "forum/topic_reply": "Topic reply",
+    "forum/banned_terms": "Banned Terms",
+    "forum/banned_terms_info": "One term per line, case insensitive",
     "forum/by": "by",
     "forum/can_create_topic": "Can create topics?",
     "forum/can_edit_topic": "Can edit their topics?",
@@ -13,6 +15,7 @@
     "forum/confirm_delete_post": "Are you sure you want to delete this post?",
     "forum/confirm_delete_topic": "Are you sure you want to delete this topic?",
     "forum/confirm_unfollow_all_topics": "Are you sure you want to unfollow all topics?",
+    "forum/content_contains_banned_term": "Your post content contains a banned term",
     "forum/content_max_50000": "Your post content must be no longer than 50.000 characters",
     "forum/content_min_2": "Your post content must be a minimum of 2 characters",
     "forum/content_required": "Please input post content",
diff --git a/modules/Forum/pages/forum/edit.php b/modules/Forum/pages/forum/edit.php
index 617247423d..55e5f4ffa9 100644
--- a/modules/Forum/pages/forum/edit.php
+++ b/modules/Forum/pages/forum/edit.php
@@ -85,7 +85,8 @@
             'content' => [
                 Validate::REQUIRED => true,
                 Validate::MIN => 2,
-                Validate::MAX => 50000
+                Validate::MAX => 50000,
+                Validate::NOT_CONTAIN => Forum::getBannedTerms(),
             ]
         ];
         // Add title to validation if we need to
@@ -101,7 +102,8 @@
             'content' => [
                 Validate::REQUIRED => $forum_language->get('forum', 'content_required'),
                 Validate::MIN => $forum_language->get('forum', 'content_min_2'),
-                Validate::MAX => $forum_language->get('forum', 'content_max_50000')
+                Validate::MAX => $forum_language->get('forum', 'content_max_50000'),
+                Validate::NOT_CONTAIN => $forum_language->get('forum', 'content_contains_banned_term'),
             ],
             'title' => [
                 Validate::REQUIRED => $forum_language->get('forum', 'title_required'),
diff --git a/modules/Forum/pages/forum/new_topic.php b/modules/Forum/pages/forum/new_topic.php
index 85d6733bf3..64253e809b 100644
--- a/modules/Forum/pages/forum/new_topic.php
+++ b/modules/Forum/pages/forum/new_topic.php
@@ -112,7 +112,8 @@
                 'content' => [
                     Validate::REQUIRED => true,
                     Validate::MIN => 2,
-                    Validate::MAX => 50000
+                    Validate::MAX => 50000,
+                    Validate::NOT_CONTAIN => Forum::getBannedTerms(),
                 ]
             ])->messages([
                 'title' => [
@@ -123,7 +124,8 @@
                 'content' => [
                     Validate::REQUIRED => $forum_language->get('forum', 'content_required'),
                     Validate::MIN => $forum_language->get('forum', 'content_min_2'),
-                    Validate::MAX => $forum_language->get('forum', 'content_max_50000')
+                    Validate::MAX => $forum_language->get('forum', 'content_max_50000'),
+                    Validate::NOT_CONTAIN => $forum_language->get('forum', 'content_contains_banned_term'),
                 ]
             ]);
 
diff --git a/modules/Forum/pages/forum/view_topic.php b/modules/Forum/pages/forum/view_topic.php
index 9a4c38a0d7..345904bbb1 100644
--- a/modules/Forum/pages/forum/view_topic.php
+++ b/modules/Forum/pages/forum/view_topic.php
@@ -248,13 +248,15 @@
             'content' => [
                 Validate::REQUIRED => true,
                 Validate::MIN => 2,
-                Validate::MAX => 50000
+                Validate::MAX => 50000,
+                Validate::NOT_CONTAIN => Forum::getBannedTerms(),
             ]
         ])->messages([
             'content' => [
                 Validate::REQUIRED => $forum_language->get('forum', 'content_required'),
                 Validate::MIN => $forum_language->get('forum', 'content_min_2'),
-                Validate::MAX => $forum_language->get('forum', 'content_max_50000')
+                Validate::MAX => $forum_language->get('forum', 'content_max_50000'),
+                Validate::NOT_CONTAIN => $forum_language->get('forum', 'content_contains_banned_term'),
             ]
         ]);
 
diff --git a/modules/Forum/pages/panel/settings.php b/modules/Forum/pages/panel/settings.php
index da82c018c5..679fb8578d 100644
--- a/modules/Forum/pages/panel/settings.php
+++ b/modules/Forum/pages/panel/settings.php
@@ -58,6 +58,7 @@
 
             Settings::set('forum_reactions', (isset($_POST['use_reactions']) && $_POST['use_reactions'] == 'on') ? '1' : 0);
             Settings::set('news_items_front_page', $_POST['news_items'], 'forum');
+            Settings::set('banned_terms', $_POST['banned_terms'], 'forum');
 
             Session::flash('admin_forums_settings', $forum_language->get('forum', 'settings_updated_successfully'));
         } else {
@@ -114,6 +115,10 @@
     'USE_REACTIONS_VALUE' => Settings::get('forum_reactions') === '1',
     'NEWS_ITEMS_ON_FRONT_PAGE' => $forum_language->get('forum', 'news_items_front_page_limit'),
     'NEWS_ITEMS_ON_FRONT_PAGE_VALUE' => Settings::get('news_items_front_page', 5, 'forum'),
+    'BANNED_TERMS' => $forum_language->get('forum', 'banned_terms'),
+    'BANNED_TERMS_INFO' => $forum_language->get('forum', 'banned_terms_info'),
+    'BANNED_TERMS_VALUE' => Output::getClean(Settings::get('banned_terms', '', 'forum')),
+    'INFO' => $language->get('general', 'info'),
     'PAGE' => PANEL_PAGE,
     'TOKEN' => Token::get(),
     'SUBMIT' => $language->get('general', 'submit')