The DSGVO All in one for WP plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.6. This is due to missing or incorrect nonce validation in the user_remove_form.php file. This makes it possible for unauthenticated attackers to delete admin user accounts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The dsgvoaio_write_log AJAX action of the DSGVO All in one for WP WordPress plugin before 4.0 did not sanitise or escape some POST parameter submitted before outputting them in the Log page in the administrator dashboard (wp-admin/admin.php?page=dsgvoaiofree-show-log). This could allow unauthenticated attackers to gain unauthorised access by using an XSS payload to create a rogue administrator account, which will be trigged when an administrator will view the logs.