brainstormforce SureForms Plugin up to 2.5.2 on WordPress Setting create_payment_intent form_id improper authentication

Summaryinfo

A vulnerability categorized as critical has been discovered in brainstormforce SureForms Plugin up to 2.5.2 on WordPress. Affected by this vulnerability is the function create_payment_intent of the component Setting Handler. Such manipulation of the argument form_id leads to improper authentication. This vulnerability is listed as CVE-2026-4987. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in brainstormforce SureForms Plugin up to 2.5.2 on WordPress. It has been rated as critical. Affected by this issue is the function create_payment_intent of the component Setting Handler. The manipulation of the argument form_id with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was presented by Jack Pas. The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-4987 since 03/27/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/29/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-16905). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• brainstormforce

Name

• SureForms Plugin

Version

• 2.5.0
• 2.5.1
• 2.5.2

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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