Cross-site scripting (XSS) vulnerability in the Advertisement module 6.x-2.x before 6.x-2.3 for Drupal, when debug mode is enabled, allows remote attackers to inject arbitrary web script or HTML via vectors related to the "$conf variable in settings.php."
https://exchange.xforce.ibmcloud.com/vulnerabilities/75718
https://drupal.org/node/1580376