Description
WordPress Plugin A. Gallery is prone to a vulnerability that lets attackers upload arbitrary files because of a bundled vulnerable version of TimThumb. An attacker can exploit this vulnerability to upload arbitrary PHP code and run it in the context of the webserver process. This may facilitate unauthorized access or privilege escalation; other attacks are also possible. WordPress Plugin A. Gallery version 0.9 revision 378511 is vulnerable; other versions may also be affected.
Remediation
Update to plugin version 0.9 revision 438727 or latest
References
http://www.exploit-db.com/exploits/17602/
http://www.exploit-db.com/exploits/17872/
http://packetstormsecurity.com/files/view/105240/timthumb-exec.txt