Cross-site scripting (XSS) vulnerability in unspecified administration pages in the Password Policy module 6.x-1.x before 6.x-1.11 and 7.x-1.x before 7.x-1.11 for Drupal, when a site has a policy that uses the username constraint, allows remote attackers to inject arbitrary web script or HTML via a crafted username that is imported from an external source.