wp-includes/taxonomy.php in WordPress 3.1 before 3.1.3 and 3.2 before Beta 2 has unknown impact and attack vectors related to "Taxonomy query hardening," possibly involving SQL injection.
https://exchange.xforce.ibmcloud.com/vulnerabilities/69169
http://www.securityfocus.com/bid/47995
http://www.debian.org/security/2012/dsa-2470