Forminator Forms 1.58.0 - 1.58.3 - Unauthenticated Disclosure of Post-Payment Redirect URL and Thank-You Message via Unpaid Stripe Checkout Session

The Forminator Forms WordPress plugin before 1.58.4 does not verify that a Stripe Checkout payment has completed before returning a pending submission's after-payment response, allowing unauthenticated visitors to obtain the post-payment redirect URL and thank-you message of a payment-gated form without paying.