The Motors – Car Dealer, Classifieds & Listing plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the stm_edit_delete_user_car function in all versions up to, and including, 1.4.8. This makes it possible for unauthenticated attackers to unpublish arbitrary posts and pages.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.