Restaurant & Cafe Addon for Elementor < 1.5.4 - Missing Authorization via multiple AJAX functions

Description

The Restaurant & Cafe Addon for Elementor plugin for WordPress is vulnerable to unauthorizedmodification of data due to a missing capability check on multiple AJAX functions in versions up to, and including, 1.5.3. This makes it possible for unauthenticated attackers to update the plugin's settings if they are able to retrieve a nonce that is only displayed on an admin page which is protected by a capability check.