diff --git a/auth/cas/auth.php b/auth/cas/auth.php
index ff06a3a3732..6615b755931 100644
--- a/auth/cas/auth.php
+++ b/auth/cas/auth.php
@@ -162,19 +162,6 @@ class auth_plugin_cas extends auth_plugin_ldap {
         }
     }
 
-    /**
-     * Logout from the CAS
-     *
-     */
-    function prelogout_hook() {
-        global $CFG;
-
-        if (!empty($this->config->logoutcas)) {
-            $backurl = $CFG->wwwroot;
-            $this->connectCAS();
-            phpCAS::logoutWithURL($backurl);
-        }
-    }
 
     /**
      * Connect to the CAS (clientcas connection or proxycas connection)
@@ -510,4 +497,22 @@ class auth_plugin_cas extends auth_plugin_ldap {
             }
         }
     }
+
+    /**
+     * Post logout hook.
+     *
+     * Note: this method replace the prelogout_hook method to avoid redirect to CAS logout
+     * before the event userlogout being triggered.
+     *
+     * @param stdClass $user clone of USER object object before the user session was terminated
+     */
+    public function postlogout_hook($user) {
+        global $CFG;
+        // Only redirect to CAS logout if the user is logged as a CAS user.
+        if (!empty($this->config->logoutcas) && $user->auth == $this->authtype) {
+            $backurl = $CFG->wwwroot;
+            $this->connectCAS();
+            phpCAS::logoutWithRedirectService($backurl);
+        }
+    }
 }
diff --git a/lib/authlib.php b/lib/authlib.php
index 2be318eaf69..6740fe22831 100644
--- a/lib/authlib.php
+++ b/lib/authlib.php
@@ -566,6 +566,16 @@ class auth_plugin_base {
 
         return $this->customfields;
     }
+
+    /**
+     * Post logout hook.
+     *
+     * This method is used after moodle logout by auth classes to execute server logout.
+     *
+     * @param stdClass $user clone of USER object before the user session was terminated
+     */
+    public function postlogout_hook($user) {
+    }
 }
 
 /**
diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 018dd908404..eef42c9ba09 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -3162,10 +3162,11 @@ function require_logout() {
     }
 
     // Execute hooks before action.
+    $authplugins = array();
     $authsequence = get_enabled_auth_plugins();
     foreach ($authsequence as $authname) {
-        $authplugin = get_auth_plugin($authname);
-        $authplugin->prelogout_hook();
+        $authplugins[$authname] = get_auth_plugin($authname);
+        $authplugins[$authname]->prelogout_hook();
     }
 
     // Store info that gets removed during logout.
@@ -3181,11 +3182,19 @@ function require_logout() {
         $event->add_record_snapshot('sessions', $session);
     }
 
+    // Clone of $USER object to be used by auth plugins.
+    $user = fullclone($USER);
+
     // Delete session record and drop $_SESSION content.
     \core\session\manager::terminate_current();
 
     // Trigger event AFTER action.
     $event->trigger();
+
+    // Hook to execute auth plugins redirection after event trigger.
+    foreach ($authplugins as $authplugin) {
+        $authplugin->postlogout_hook($user);
+    }
 }
 
 /**