Multiple directory traversal vulnerabilities in Web Wiz Forums 9.07 and earlier allow remote attackers to list arbitrary directories, and .txt and .zip files, via a .....\\\ in the sub parameter to (1) RTE_file_browser.asp or (2) file_browser.asp.
https://www.exploit-db.com/exploits/4970
https://exchange.xforce.ibmcloud.com/vulnerabilities/39856
http://www.webwizguide.com/webwizforums/kb/release_notes.asp
http://www.securityfocus.com/bid/27419
http://www.securityfocus.com/archive/1/486866/100/0/threaded