nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-4160 CVE-2026-4160
MEDIUM
Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder <= 6.1.21 - Insecure Direct Object Reference in Stripe SCA Confirmation to Unauthenticated Payment Status Modification
Record summary
CVE-2026-4160 has a selected CVSS score of 5.3 (medium).
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").
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableYes
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Apr 16, 2026 · Source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form BuilderBrowse techjewel / Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form BuilderDefault status: unaffected | CVE List | 6.1.21 | affected |
References
3plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3496638/fluentform wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/154fc656-3a33-4783-a941-10bb848244b3?source=cve