Provide references for CVE-2021-39309.
Where can I find more information about CVE-2021-39309?
References are available at: https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39309, https://plugins.trac.wordpress.org/browser/parsian-bank-gateway-for-woocommerce/tags/1.0/vendor/dpsoft/parsian-payment/sample/rollback-payment.php#L39.