CVE-2026-4160: Techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'submission_id' parameter in versions up to, and including, 6.1.21. This is due to missing authorization and ownership validation on a user controlled key in the Stripe SCA confirmation AJAX endpoint. This makes it possible for unauthenticated attackers to modify payment status of targeted pending submissions (for example, setting the status to "failed").

Affected products

• Techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder: version 6.1.21 only

Published 2026-04-16. Last modified 2026-06-17.