Cross-site scripting (XSS) vulnerability in the LoginToboggan module 4.7.x-1.0 4.7.x-1.x-dev and 5.x-1.x-dev before 20070712 for Drupal when configured to display a \Log out\ link allows remote attackers to inject arbitrary web script or HTML via a crafted username. NOTE: Drupal sanitizes the username by removing certain characters so this might not be a vulnerability on default installations.