PHPAdsNew PHP script allows remote attackers to include arbitrary files from remote web sites via an HTTP request that sets the includedir variable.
http://www.securityfocus.com/bid/3392
http://www.iss.net/security_center/static/7215.php
http://sourceforge.net/forum/forum.php?thread_id=148900&forum_id=117952
http://sourceforge.net/forum/forum.php?forum_id=117952
http://archives.neohapsis.com/archives/bugtraq/2001-10/0012.html