CVE-2026-4160 — Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder [fluentform] < 6.2.0

CVE	Vulnerability	Type	Severity	Affected	Fixed in	Published	Status
CVE-2026-4160	Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder [fluentform] < 6.2.0	Authorization Bypass Through User-Controlled Key	Medium 5.3	< 6.2.0	6.2.0	2026-04-16	—

CVE-2026-4160

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").

Source: CVE.org

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