The WP-Recall – Registration, Profile, Commerce & More plugin for WordPress is vulnerable to arbitrary shortcode execution due to a missing capability check on the 'rcl_preview_post' AJAX endpoint in all versions up to, and including, 16.26.10. This makes it possible for authenticated attackers, with Subscriber-level access and above, to execute arbitrary shortcodes.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.