DSGVO All in one for WP < 4.4 - Cross-Site Request Forgery

Description

The DSGVO All in one for WP plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.3. This is due to missing or incorrect nonce validation on the dsgvo_ajax_remove_usr_ip() function. This makes it possible for unauthenticated attackers to remove IP addresses via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.