Frontend Registration – Contact Form 7 <= 5.1 - Authenticated (Editor+) Privilege Escalation

Description The Frontend Registration – Contact Form 7 plugin for WordPress is vulnerable to privilege escalation in versions up to, and including, 5.1 due to insufficient restriction on the ‘cf7frr’ post meta. This makes it possible for authenticated attackers, with editor-level access and above, to modify the default user role in the registration form settings.