The Gift Cards (Gift Vouchers and Packages) (WooCommerce Supported) plugin for WordPress is vulnerable to unauthorized modification of data|loss of data due to a missing capability check on the 'update_voucher_price', 'update_voucher_date', 'update_voucher_note' functions in all versions up to, and including, 4.4.6. This makes it possible for unauthenticated attackers to update the value, expiration date, and user note for any gift voucher.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.