PT-2026-33318 · Techjewel · Fluent Forms – Customizable Contact Forms

Prickly Cactus · Published 2026-04-16 · Updated 2026-04-16 · CVE-2026-4160

Mitre

CVSS v3.1

5.3

Medium

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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").

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-4160

Affected Products

Fluent Forms – Customizable Contact Forms

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-4160 · Security Note
• https://plugins.trac.wordpress.org/changeset/3496638/fluentform · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/154fc656-3a33-4783-a941-10bb848244b3?source=cve · Note