ctools 6.x-1.x before 6.x-1.14 and 7.x-1.x before 7.x-1.8 in Drupal does not verify the "edit" permission for the "content type" plugins that are used on Panels and similar systems to place content and functionality on a page.

Cross-site scripting (XSS) vulnerability in the Ajax handler in Drupal 7.x before 7.39 and the Ctools module 6.x-1.x before 6.x-1.14 for Drupal allows remote attackers to inject arbitrary web script or HTML via vectors involving a whitelisted HTML element, possibly related to the "a" tag.