The version of Moodle on the remote host contains a flaw that allows a remote cross site scripting attack because the application does not validate the 'reply' variable upon submission to the 'post.php' script. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.

Upgrade to Moodle 1.4 or newer.