The Classified Listing – AI-Powered Classified ads & Business Directory Plugin plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the "rtcl_ajax_add_listing_type", "rtcl_ajax_update_listing_type", and "rtcl_ajax_delete_listing_type" function in all versions up to, and including, 5.2.0. This makes it possible for authenticated attackers, with subscriber level access and above, to add, update, or delete listing types.
