The Epeken All Kurir for Woocommerce WordPress plugin through 2.1.2 does not verify that a payment-confirmation request originates from the owner of the targeted order, nor that any payment actually occurred, allowing unauthenticated attackers to mark arbitrary orders as confirmed and, in a non-default configuration, paid.
https://wpscan.com/vulnerability/b66b86f9-e49e-4654-84a1-0f2e5c859289/