WordPress 3.1 before 3.1.3 and 3.2 before Beta 2 treats unattached attachments as published, which might allow remote attackers to obtain sensitive data via vectors related to wp-includes/post.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/69171
http://www.securityfocus.com/bid/47995
http://www.debian.org/security/2012/dsa-2470
http://wordpress.org/news/2011/05/wordpress-3-1-3/