The Security Questions module for Drupal 6.x-1.x before 6.x-1.1 and 7.x-1.x before 7.x-1.1 does not properly restrict access, which allows remote attackers to edit an arbitrary user's questions and answers via unspecified vectors.
http://www.openwall.com/lists/oss-security/2012/10/04/3
http://drupal.org/node/1679532