Automattic: Timing attack woocommerce, simplify commerce gateway

file class-wc-gateway-simplify-commerce.php method returnhandler e.g. where woocommerce marks the order regarding its payment / transaction. public function returnhandler @obclean; header 'HTTP/1.1 200 OK' ; if isset $REQUEST'reference' && isset $REQUEST'paymentId' && isset $REQUEST'signature'...