Directory traversal vulnerability in help.php in Trustport Webfilter 5.5.0.2232 allows remote attackers to read arbitrary files via a .. (dot dot) in the hf parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/86289
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-5141
http://www.securityfocus.com/bid/61662
http://packetstormsecurity.com/files/122735/Trustport-Webfilter-Traversal-File-Disclosure.html
http://archives.neohapsis.com/archives/bugtraq/2013-08/0043.html