CVE-2026-4987: Brainstormforce Sureforms – Contact Form, Payment Form & Other Custom Form Builder

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

The SureForms – Contact Form, Payment Form & Other Custom Form Builder plugin for WordPress is vulnerable to Payment Amount Bypass in all versions up to, and including, 2.5.2. This is due to the create_payment_intent() function performing a payment validation solely based on the value of a user-controlled parameter. This makes it possible for unauthenticated attackers to bypass configured form payment-amount validation and create underpriced payment/subscription intents by setting form_id to 0.

Affected products

• Brainstormforce Sureforms – Contact Form, Payment Form & Other Custom Form Builder: up to and including 2.5.2

Published 2026-03-28. Last modified 2026-06-17.