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CVE-2025-3479: Forminator <= 1.42.0 - Order Replay Vulnerability

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-17 · updated 2026-06-17
• Weakness: CWE-354

Description

The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Order Replay in all versions up to, and including, 1.42.0 via the 'handle_stripe_single' function due to insufficient validation on a user controlled key. This makes it possible for unauthenticated attackers to reuse a single Stripe PaymentIntent for multiple transactions. Only the first transaction is processed via Stripe, but the plugin sends a successful email message for each transaction, which may trick an administrator into fulfilling each order.

Affected products

• wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder: before 1.42.1 — fixed in 1.42.1

How to fix

Upgrade to a fixed version: wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder 1.42.1. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/forminator/tags/1.41.2/library/modules/custom-forms/front/front-action.php#L964
• https://plugins.trac.wordpress.org/changeset/3274844/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c873c04e-516e-41ee-a295-b8c5235abc1b?source=cve

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