Secunia Security Advisory – Some vulnerabilities have been reported in the AddonChat module for Drupal, which can be exploited by malicious users to conduct script insertion attacks and by malicious people to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/90001/sa39969.txt
Source: https://packetstormsecurity.com/files/90001/Secunia-Security-Advisory-39969.html