CVE-2026-4160

Description

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").

PUBLISHED Reserved 2026-03-13 | Published 2026-04-16 | Updated 2026-04-16 | Assigner Wordfence

Problem types

CWE-639 Authorization Bypass Through User-Controlled Key

Product status

Timeline

Credits

Prickly Cactus finder

References

www.wordfence.com/...-3a33-4783-a941-10bb848244b3?source=cve

plugins.trac.wordpress.org/changeset/3496638/fluentform

cve.org (CVE-2026-4160)

nvd.nist.gov (CVE-2026-4160)

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