Essential Addons for Elementor <= 6.8.7 - Unauthenticated Privilege Escalation to 'page_id' Parameter via Elementor Revision

The Essential Addons for Elementor – Popular Elementor Templates & Widgets plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 6.8.7 via the page_id parameter of the register_user() function. The vulnerability exists because the handler's post status deny-list rejects future, draft, and pending but admits inherit — the status carried by every WordPress revision — allowing an attacker to substitute a revision ID for a live page ID, while a flawed "last saved by administrator" check reads post_author on revisions (which reflects the editing administrator) rather than the _edit_last meta that is never copied to revisions, and the nonce gate is rendered ineffective because any unauthenticated visitor can freely obtain a valid nonce via the wp_ajax_nopriv_eael_get_token endpoint. This makes it possible for unauthenticated attackers to register an account with a role as high as Editor — gaining capabilities including edit_others_posts, publish_pages, upload_files, and unfiltered_html — by naming a revision whose _elementor_data contains an elevated role an administrator previously saved and later reverted on a page bearing the Login/Register widget. Successful exploitation requires that the site has "Anyone can register" enabled and that an administrator has at some point saved and then reverted a non-default "New User Role" on an affected page.