OPay Payment Gateway for WooCommerce, CVE-2026-103319

CVE, Research URL: CVE-2026-103319
Home page URL: Security reports for OPay Payment Gateway for WooCommerce
Application: OPay Payment Gateway for WooCommerce
Published on: Oct 26, 2026
Research Description: The OPay Payment Gateway for WooCommerce WordPress plugin through 2.5.5 does not properly verify that payment notifications originate from the payment provider, as the secret used to validate their signature is empty by default, allowing unauthenticated attackers to forge a valid notification and mark arbitrary orders as paid, cancelled or failed.
Affected versions: max 2.5.5.
Status: vulnerable