The Node View Permissions module 7.x-1.x before 7.x-1.2 for Drupal does not properly implement the hook_query_alter function, which might allow remote attackers to obtain sensitive information by reading a node listing.
https://drupal.org/node/2076315
https://drupal.org/node/2031621
http://www.openwall.com/lists/oss-security/2013/09/11/9
http://secunia.com/advisories/54550
http://archives.neohapsis.com/archives/bugtraq/2013-08/0184.html