Cross-site scripting (XSS) vulnerability in posts.php in 427BB 2.2 and 2.2.1 allows remote attackers to inject arbitrary Javascript via a new message with a url bbcode tag containing a javascript URI.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24040
http://www.vupen.com/english/advisories/2006/0091
http://www.securityfocus.com/archive/1/421326/100/0/threaded