source: https://www.securityfocus.com/bid/24572/info

PHP Accounts is prone to a local file-include vulnerability because it fails to properly sanitize user-supplied input.

Exploiting this issue may allow an unauthorized user to view files and execute local scripts.

PHP Accounts 0.5 is vulnerable; other versions may also be affected. 

http://www.example.com/index.php?page=../../etc/passwd