Auth bypass in Techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
CVE-2026-5396
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-5396?
- CVE-2026-5396 is a high-severity vulnerability in Techjewel Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.2/10. Published 2026-05-14.
- How severe is CVE-2026-5396?
- High severity. CVSS v3 base score is 8.2 out of 10.