diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 98360fe70..b214f7540 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -1,13 +1,6 @@
 /* Redmine - project management software
    Copyright (C) 2006-2020  Jean-Philippe Lang */
 
-/* Fix for CVE-2015-9251, to be removed with JQuery >= 3.0 */
-$.ajaxPrefilter(function (s) {
-  if (s.crossDomain) {
-    s.contents.script = false;
-  }
-});
-
 function checkAll(id, checked) {
   $('#'+id).find('input[type=checkbox]:enabled').prop('checked', checked);
 }