Provide references for CVE-2020-8818.
Where can I find more information about CVE-2020-8818?
References are available at: https://github.com/cardgate/magento2/blob/715979e54e1a335d78a8c5586f9e9987c3bf94fd/Controller/Payment/Callback.php#L88-L107, https://github.com/cardgate/magento2/issues/54, http://packetstormsecurity.com/files/156505/Magento-WooCommerce-CardGate-Payment-Gateway-2.0.30-Bypass.html.