editform.php in w-Agora 4.1.5 allows local users to execute arbitrary PHP code via .. (dot dot) sequences in the file parameter.
http://www.securityfocus.com/bid/6463
http://www.iss.net/security_center/static/10919.php
http://archives.neohapsis.com/archives/bugtraq/2002-12/0225.html
http://archives.neohapsis.com/archives/bugtraq/2002-12/0222.html