source: https://www.securityfocus.com/bid/21511/info

Ã?ilem Haber Free Edition is prone to a cross-site scripting vulnerability because the application fails to properly sanitize user-supplied input. 

An attacker may leverage this issue to have arbitrary script code execute in the browser of an unsuspecting user. This may help the attacker steal cookie-based authentication credentials and launch other attacks.

http://www.example.com/[path to script]/editor_haber/hata.asp?hata=[XSS]