Kalium <= 3.29 - Missing Authorization to Unauthenticated Mail Relay via kalium_vc_contact_form_request

The Kalium 3 | Creative WordPress & WooCommerce Theme theme for WordPress is vulnerable to unauthorized email sending due to a missing capability check on the kalium_vc_contact_form_request() function in all versions up to, and including, 3.29. This makes it possible for unauthenticated attackers to use the theme an an open mail relay and send email to arbitrary email addresses on the server's behalf.