wp-admin/admin-functions.php in Wordpress before 2.2.3 and Wordpress multi-user (MU) before 1.2.5a does not properly verify the unfiltered_html privilege, which allows remote attackers to conduct cross-site scripting (XSS) attacks via modified data to (1) post.php or (2) page.php with a no_filter field.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36576
https://bugzilla.redhat.com/show_bug.cgi?id=285831
http://www.vupen.com/english/advisories/2007/3132
http://www.securityfocus.com/bid/25639
http://wordpress.org/development/2007/09/wordpress-223/
http://trac.wordpress.org/ticket/4720
http://secunia.com/advisories/26796