The Online Booking & Scheduling Calendar for WordPress by vcita plugin for WordPress is vulnerable to unauthorized medication of data via the /wp-json/vcita-wordpress/v1/actions/auth REST-API endpoint in versions up to, and including, 4.2.10 due to a missing capability check on the processAction function. This makes it possible for unauthenticated attackers modify the plugin's settings.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.