The Eleblog – Elementor Blog And Magazine Addons plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the goodbye_form_callback() function in all versions up to, and including, 1.8. This makes it possible for authenticated attackers, with Subscriber-level access and above, to submit a deactivation reason.
https://plugins.trac.wordpress.org/browser/ele-blog/trunk/inc/class-ele-blog-quick-feedback.php#L350