Unlimited Elements For Elementor < 2.0.21 - Subscriber+ Arbitrary Shortcode Execution via get_addon_output_data

The Unlimited Elements for Elementor WordPress plugin before 2.0.21 does not check that a request to render widget output comes from a user allowed to make it, allowing users with a role as low as subscriber to have arbitrary WordPress shortcodes executed on the site. Version 2.0.18 removed the subscriber-level access, so from 2.0.18 onward the issue requires a Contributor role or above.