What’s Vulnerable › Vulnerabilities

CVE-2026-4987: SureForms <= 2.5.2 - Unauthenticated Payment Amount Validation Bypass via 'form_id'

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-28 · updated 2026-06-17
• Weakness: CWE-20

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

• brainstormforce SureForms – Contact Form, Payment Form & Other Custom Form Builder: through 2.5.2

References

• https://plugins.trac.wordpress.org/changeset/3488858/sureforms
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c4772b32-a730-44f2-b43c-f9bd5abb6541?source=cve

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