Unrestricted file upload vulnerability in uploadify/scripts/uploadify.php in the Kish Guest Posting plugin before 1.2 for WordPress allows remote attackers to execute arbitrary code by uploading a file with a PHP extension, then accessing it via a direct request to the file in the directory specified by the folder parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/79563
http://www.openwall.com/lists/oss-security/2012/03/08/1
http://www.openwall.com/lists/oss-security/2012/03/06/3
http://www.openwall.com/lists/oss-security/2012/03/06/11
http://secunia.com/advisories/47688
http://plugins.svn.wordpress.org/kish-guest-posting/trunk/readme.txt