CVE-2026-91017

Name of the Vulnerable Software and Affected Versions Robokassa payment gateway for Woocommerce WordPress plugin versions prior to 1.8.9

Description The plugin fails to verify the authenticity of incoming payment notifications when the non-default deferred-payment feature is enabled. This allows unauthenticated attackers to forge notifications and mark arbitrary WooCommerce orders as paid or on-hold without providing a valid signature or completing the payment.

Recommendations Update the Robokassa payment gateway for Woocommerce WordPress plugin to version 1.8.9 or later. As a temporary mitigation, disable the deferred-payment feature.