SQL injection vulnerability in WordPress 1.5.2, and possibly other versions before 2.0, allows remote attackers to execute arbitrary SQL commands via the User-Agent field in an HTTP header for a comment.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25321
http://www.securityfocus.com/bid/16950
http://www.gentoo.org/security/en/glsa/glsa-200603-01.xml