Net Portal Dynamic System (NPDS) 5.10 and earlier allows remote attackers to obtain sensitive information via a direct request to (1) header.php, (2) contact.php, or (3) forum_extender.php, which reveals the path in an error message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27124
http://www.vupen.com/english/advisories/2006/2233
http://www.securityfocus.com/archive/1/436442/100/0/threaded