The Linkz.ai plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'check_auth' and 'check_logout' functions in versions up to, and including, 1.1.8. This makes it possible for unauthenticated attackers to update plugin settings.
https://plugins.trac.wordpress.org/browser/linkz-ai/tags/1.1.8/init.php#L159
https://plugins.trac.wordpress.org/browser/linkz-ai/tags/1.1.8/init.php#L142