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/member.phpaction=viewpro&member=admin&lt;script&gt;alert('XSS')&lt;/script&gt;