WordPress Payment Gateway PayPay for WooCommerce plugin 0.5-0.9.3 - Unauthenticated Payment Bypass vulnerability

Unauthenticated Payment Bypass vulnerability discovered by Pedro Pinho in WordPress Plugin Payment Gateway PayPay for WooCommerce versions 0.5-0.9.3...

CVE-2026-82215: Insufficient Verification of Data Authenticity

The Payment Gateway PayPay for WooCommerce WordPress plugin from 0.5 to 0.9.3 does not verify the authenticity of the payment notifications it receives before acting on them, allowing unauthenticated attackers who know the store's merchant identifier to mark arbitrary orders as paid, or to cancel...