CVE-2026-2890 Formidable Forms <= 6.28 - Missing Authorization to Unauthenticated Payment Integrity Bypass via PaymentIntent Reuse

The Formidable Forms plugin for WordPress is vulnerable to a payment integrity bypass in all versions up to, and including, 6.28. This is due to the Stripe Link return handler handleonetimestripelinkreturnurl marking payment records as complete based solely on the Stripe PaymentIntent status...