source: www.securityfocus.com/bid/43490/info
 
Ultra Classifieds is prone to multiple cross-site scripting vulnerabilities because the software fails to sufficiently sanitize user-supplied input
 
An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and to launch other attacks.
 
Ultra Classifieds Pro is vulnerable; other versions may also be affected.

http://www.example.com/ultraclassifieds/subclass.php?c=18&cname=1<script>alert(308954043099)</script> 