Cross-site scripting (XSS) vulnerability in WordPress before 3.1.1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
http://www.openwall.com/lists/oss-security/2012/04/19/6
http://www.openwall.com/lists/oss-security/2012/04/19/17
http://www.debian.org/security/2012/dsa-2470
http://wordpress.org/news/2011/04/wordpress-3-1-1/