Envo's Templates & Widgets for Elementor and WooCommerce <= 1.4.26 - Missing Authorization to Authenticated (Author+) Private Content Disclosure via Envo Tabs Widget 'templates' Setting

The Envo's Templates & Widgets for Elementor and WooCommerce plugin for WordPress is vulnerable to unauthorized access of data due to a missing authorization check on the Envo Tabs (and Off Canvas) widget's template rendering in versions up to, and including, 1.4.26. The render() method of the Tabs widget passes a user-controlled template/post ID directly to Elementor's get_builder_content_for_display() without verifying the referenced post's status (published/private/draft) or the visitor's authorization to view it. This makes it possible for authenticated attackers, with Author-level access and above, to disclose the contents of private Elementor-driven pages and templates to anonymous visitors by configuring an Envo Tabs widget on a public post to reference the private content's ID (which can be supplied by editing the underlying Elementor widget JSON via the Elementor editor REST API).