The Chaos Tool Suite (ctools) module 7.x-1.x before 7.x-1.3 for Drupal does not properly restrict node access, which allows remote authenticated users with the "access content" permission to read restricted node titles via an autocomplete list.
https://exchange.xforce.ibmcloud.com/vulnerabilities/83254
https://drupal.org/node/1960424
https://drupal.org/node/1960406
http://seclists.org/fulldisclosure/2013/Apr/8
http://packetstormsecurity.com/files/121072/Drupal-Chaos-Tool-Suite-7.x-Access-Bypass.html