Index: lib/model/doctrine/PluginDeletedMessageTable.class.php
===================================================================
--- lib/model/doctrine/PluginDeletedMessageTable.class.php	(リビジョン 13346)
+++ lib/model/doctrine/PluginDeletedMessageTable.class.php	(作業コピー)
@@ -133,7 +133,7 @@
    */
   public function restoreMessage($message_id)
   {
-    $deleted_message = $this->find($message_id);
+    $deleted_message = $this->findOneByIdAndMemberId($message_id, sfContext::getInstance()->getUser()->getMemberId());
     if (!$deleted_message) {
       return false;
     }
Index: lib/action/opMessagePluginMessageActions.class.php
===================================================================
--- lib/action/opMessagePluginMessageActions.class.php	(リビジョン 13346)
+++ lib/action/opMessagePluginMessageActions.class.php	(作業コピー)
@@ -195,7 +195,7 @@
   {
     $request->checkCSRFProtection();
 
-    Doctrine::getTable('DeletedMessage')->restoreMessage($request->getParameter('id'));
+    $this->forward404Unless(Doctrine::getTable('DeletedMessage')->restoreMessage($request->getParameter('id')));
     $this->redirect('@dustList');
   }