The Appointment Booking Calendar Plugin and Online Scheduling Plugin – BookingPress plugin for WordPress is vulnerable to authentication bypass in versions 1.1.6 to 1.1.7. This is due to the plugin not properly verifying a users identity prior to logging them in when completing a booking. This makes it possible for unauthenticated attackers to log in as registered users, including administrators, if they have access to that users email. This is only exploitable when the Auto login user after successful booking setting is enabled.
A product requires authentication, but the product has an alternate path or channel that does not require authentication.