CVE-2026-17016 Restore PayPal Standard for WooCommerce <= 3.1.0 - Payment Bypass via PDT Underpayment

The Accept PayPal & Stripe with Subscriptions for WooCommerce WordPress plugin through 3.1.0 does not validate the amount actually paid against the order total in its PayPal Data Transfer return handler, allowing a customer to pay less than the order total and still have the order marked as fully...