Unrestricted file upload vulnerability in the UpLoad feature (lib/plugin/UpLoad.php) in PhpWiki 1.3.11p1 allows remote attackers to upload arbitrary PHP files with a double extension, as demonstrated by .php.3, which is interpreted by Apache as being a valid PHP file.
https://sourceforge.net/forum/message.php?msg_id=4249177
http://www.gentoo.org/security/en/glsa/glsa-200705-16.xml
http://www.debian.org/security/2007/dsa-1371