CVE-2026-4160 - 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

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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

Published Apr 16, 2026

5.3

MEDIUM

CVSS 3.1

EPSS 0.31%

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").

Affected products

Vendor Techjewel Product n/a Default
unaffected
- Version
  6.1.21
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Techjewel

n/a

unaffected

Version	Status	Constraints
6.1.21	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-639

Authorization Bypass

References (3)

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-23237		Advisory
https://plugins.trac.wordpress.org/changeset/3496638/fluentform
https://www.wordfence.com/threat-intel/vulnerabilities/id/154fc656-3a33-4783-a941-10bb848244b3?source=cve