Vulnerability · Published Mar 28, 2026 · Assigned by Wordfence
CVE-2026-4987SureForms <= 2.5.2 - Unauthenticated Payment Amount Validation Bypass via 'form_id'
High 7.5
In plain English
A high-severity improper input validation in SureForms – Contact Form, Payment Form & Other Custom Form Builder from brainstormforce. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| brainstormforce | SureForms – Contact Form, Payment Form & Other Custom Form Builder | 0 – through 2.5.2 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N