The Tutor LMS plugin for WordPress is vulnerable to bypass to user registration in versions up to, and including, 2.7.6. This is due to a missing check for the 'users_can_register' option in the 'register_instructor' function. This makes it possible for unauthenticated attackers to register as the default role on the site, even if registration is disabled.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.