Topic Calendar XSS

Summary
The remote web server contains a PHP script which is vulnerable to a cross site scripting issue. Description : The remote host is running Topic Calendar, a module for phpBB which adds calendaring support to phpBB. Due to improper filtering done by the script 'calendar_scheduler.php' a remote attacker can cause the Topic Calendar product to include arbitrary HTML and/or JavaScript.
Solution
Disable this module or upgrade to a newer version