This module provides integration with Mailchimp, a popular email delivery service. A route related to OAuth authentication is not protected against a Cross Site Request Forgery attack.
www.drupal.org/project/mailchimp/releases/2.2.2
www.drupal.org/user/17943
www.drupal.org/user/2210776
www.drupal.org/user/2799483
www.drupal.org/user/36762
www.drupal.org/user/369147