CVE-2026-2729 PUBLISHED

Forminator – Contact Form, Payment Form & Custom Form Builder <= 1.52.0 - Missing Authorization to Unauthenticated Stripe PaymentIntent Reuse / Underpayment Bypass via 'paymentid' Parameter

Assigner: Wordfence
Reserved: 19.02.2026 Published: 05.05.2026 Updated: 05.05.2026

The Forminator plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.52.0. This is due to the plugin not properly verifying that a user is authorized to perform an action when processing attacker-supplied Stripe PaymentIntent identifiers in the public payment flow. This makes it possible for unauthenticated attackers to submit high-value paid forms as completed by reusing a previously succeeded low-value Stripe PaymentIntent, resulting in underpayment/payment bypass conditions.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 5.3

Product Status

Vendor wpmudev
Product Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Versions Default: unaffected
  • affected from 0 to 1.52.0 (incl.)

Credits

  • Kittipat Jitphonchana finder

References

Problem Types

  • CWE-639 Authorization Bypass Through User-Controlled Key CWE