source: https://www.securityfocus.com/bid/27184/info
SysHotel On Line System is prone to a local file-include vulnerability because it fails to properly sanitize user-supplied input.
An attacker can exploit this vulnerability using directory-traversal strings to execute local script code in the context of the application. This may allow the attacker to access sensitive information that may aid in further attacks.
http://www.example.com/index.php?file==%2Fetc%2Fpasswd