Directory traversal vulnerability in TinyPHPForum 3.6 and earlier allows remote attackers to create a new user account, create a new topic, or view the profile of a user account, as demonstrated via a .. (dot dot) in the uname parameter to profile.php.
http://www.vupen.com/english/advisories/2006/0054
http://www.securityfocus.com/bid/16163
http://www.securityfocus.com/archive/1/420933/100/0/threaded
http://securitytracker.com/id?1015436
http://securityreason.com/securityalert/320