Cross-site scripting (XSS) vulnerability in X7 Chat 2.0.2 and earlier allows remote attackers to inject arbitrary web script or HTML via a javascript URI in the URL of an avatar, possibly related to the avatar parameter in register.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26327
http://www.vupen.com/english/advisories/2006/1702
http://www.securityfocus.com/bid/17869
http://www.securityfocus.com/archive/1/433131/100/0/threaded