The Taxonomy module in Drupal 7.x before 7.26, when upgraded from an earlier version of Drupal, does not properly restrict access to unpublished content, which allows remote authenticated users to obtain sensitive information via a listing page.
https://drupal.org/SA-CORE-2014-001
http://www.securityfocus.com/bid/64973
http://www.mandriva.com/security/advisories?name=MDVSA-2014:031