Multiple cross-site scripting (XSS) vulnerabilities in the Excluded Users module 6.x-1.x before 6.x-1.1 for Drupal allow remote attackers to inject arbitrary web script or HTML via a (1) user name or (2) email address.
http://www.securityfocus.com/bid/54766
http://www.openwall.com/lists/oss-security/2012/10/07/1
http://www.openwall.com/lists/oss-security/2012/10/04/6