Unrestricted file upload vulnerability in the UpLoad feature (lib/plugin/UpLoad.php) in PhpWiki 1.3.x allows remote attackers to upload arbitrary PHP files with a (1) php3, (2) php4, or (3) php5 extension.
http://www.vupen.com/english/advisories/2007/1400
http://www.securityfocus.com/archive/1/465550/100/0/threaded
http://www.securityfocus.com/archive/1/465514/100/0/threaded
http://www.securityfocus.com/archive/1/465489/100/0/threaded
http://www.nabble.com/Fwd%3A-Critical-phpwiki-c99shell-exploit-t3571197.html
http://www.kb.cert.org/vuls/id/914793
http://www.gentoo.org/security/en/glsa/glsa-200705-16.xml
http://www.debian.org/security/2007/dsa-1371
http://secunia.com/advisories/26784