Additional check of variables

editservice.php

@@ -22,6 +22,8 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined("MOODLE_INTERNAL") || die();
+
 require_once(__DIR__ . "/../../config.php");
 require_once(__DIR__ . "/classes/editform.php");
 require_once($CFG->libdir . "/adminlib.php");