ElementsKit Lite <3.7.9 - Unauthenticated Mailchimp Proxy

The ElementsKit Elementor Addons Lite elementskit-lite plugin for WordPress before 3.7.9 registers the REST route /wp-json/elementskit/v1/widget/mailchimp/subscribe with no authentication or capability check CWE-306. The handler accepts client-supplied Mailchimp API credentials and a list paramet...