Komfortkasse for WooCommerce < 1.4.9 - Administrator Account Creation via CSRF

The Komfortkasse for WooCommerce WordPress plugin before 1.4.9 does not properly validate the authenticity of REST API requests, overriding WordPress's own nonce verification so that a request forged in a logged-in administrator's browser is accepted, which can be used to create a new administrator account and fully take over the site.