Cross-site request forgery (CSRF) vulnerability in the Shibboleth Authentication module before 6.x-4.1 and 7.x-4.x before 7.x-4.1 for Drupal allows remote attackers to hijack the authentication of administrators for requests that delete user role matching rules via unspecified vectors.
https://www.drupal.org/node/2411737
https://www.drupal.org/node/2411271
https://www.drupal.org/node/2411269