Directory traversal vulnerability in avatar.php in CoolForum 0.5 beta allows remote attackers to read arbitrary files via .. (dot dot) sequences in the img parameter.
http://www.securityfocus.com/bid/5973
http://www.iss.net/security_center/static/10237.php
http://www.coolforum.net/index.php?p=dlcoolforum
http://archives.neohapsis.com/archives/vulnwatch/2002-q4/0001.html