PT-2026-40870 · Techjewel · Fluent Forms – Customizable Contact Forms

Sander Horsman · Published 2026-05-14 · Updated 2026-05-14 · CVE-2026-5396

NVD

CVSS v3.1

8.2

High

Base vector

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

The Fluent Forms plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to, and including, 6.1.21. This is due to the SubmissionPolicy class authorizing submission-level actions (read, modify, delete, add notes) based on a user-supplied form id query parameter. This makes it possible for authenticated attackers, with Fluent Forms Manager access restricted to specific forms, to read, modify status, add notes to, and permanently delete form submissions belonging to any other form by spoofing the form id parameter to a form they are authorized for.

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-5396

Affected Products

Fluent Forms – Customizable Contact Forms

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-5396 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/81aad41e-0330-4dff-a5f8-08a108d724f5?source=cve · Note
• https://plugins.trac.wordpress.org/changeset?old_path=/fluentform/tags/6.1.21/app/Http/Policies/SubmissionPolicy.php&new_path=/fluentform/tags/6.2.0/app/Http/Policies/SubmissionPolicy.php · Note