source: https://www.securityfocus.com/bid/15436/info

phpWCMS is prone to multiple remote file-include vulnerabilities because the application fails to properly sanitize user-supplied input.

An attacker may leverage these issues to obtain sensitive information that may help with further attacks on the affected computer. 

http://www.example.com/phpwcms/login.php?form_lang=../../../../../../../../etc/passwd%00