Search, Filters & Merchandising for WooCommerce <= 3.0.67 - Missing Authorization to Authenticated (Subscriber+) Plugin Deactivation

The Search, Filters & Merchandising for WooCommerce plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'wcis_save_email' endpoint in all versions up to, and including, 3.0.67. This makes it possible for authenticated attackers, with Subscriber-level access and above, to deactivate the plugin.