Is CVE-2026-5396 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-5396 being exploited in the wild.

How severe is CVE-2026-5396?

High severity, with a CVSS score of 8.2, published 14 May 2026.

Which products and versions are affected?

WPManageNinja Fluent Forms up to, and including, 6.1.21.

Is there a fix for CVE-2026-5396?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-5396 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-5396?

Check whether you run WPManageNinja Fluent Forms at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-5396: WPManageNinja Fluent Forms authorization bypass in SubmissionPolicy

CVE-2026-5396 · Severity: high · CVSS 8.2 · Published 2026-05-14

Fluent Forms is a popular WordPress plugin used to create and manage contact forms and collect user submissions. A security flaw allows users with restricted administrative access to bypass permissions and view, modify, or delete form submissions belonging to other forms they should not be able to access. This could lead to the unauthorized exposure of sensitive customer data or the permanent loss of form records.

Technologies: WPManageNinja Fluent Forms. Vendors: WPManageNinja.

Quick answers

Is CVE-2026-5396 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-5396 being exploited in the wild.
How severe is CVE-2026-5396?: High severity, with a CVSS score of 8.2, published 14 May 2026.
Which products and versions are affected?: WPManageNinja Fluent Forms up to, and including, 6.1.21.
Is there a fix for CVE-2026-5396?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-5396 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-5396?: Check whether you run WPManageNinja Fluent Forms at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability exists within the SubmissionPolicy class, which incorrectly validates authorization for submission-level actions (read, modify, delete, add notes) based on a user-supplied 'form_id' query parameter. An authenticated attacker with 'Fluent Forms Manager' access—even if restricted to specific forms—can exploit this Insecure Direct Object Reference (IDOR) flaw by providing a 'form_id' for a form they are authorized to manage while targeting submissions belonging to a different, unauthorized form. This allows for unauthorized data exfiltration, status modification, and permanent deletion of form entries. The issue is addressed in version 6.2.0.

Affected products

WPManageNinja Fluent Forms up to, and including, 6.1.21

Timeline

2026-05-14: disclosed
2026-05-14: advisory

References

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