The Zass - WooCommerce Theme for Handmade Artists and Artisans theme for WordPress is vulnerable to unauthorized access due to a missing capability check on the 'zass_import_zass' AJAX actions in all versions up to, and including, 3.9.9.10. This makes it possible for authenticated attackers, with Subscriber-level access and above, to import demo content and overwrite the site.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.