The Remove NoFollow Commenter URL plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0. This is due to missing or incorrect nonce validation on the gmz_comment_settings_save function. This makes it possible for unauthenticated attackers to modify the plugin's comment-display setting via a forged request via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.