Is CVE-2026-6828 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-6828 being exploited in the wild.

How severe is CVE-2026-6828?

Medium severity, with a CVSS score of 6.4, published 13 May 2026.

Which products and versions are affected?

WPManageNinja Fluent Forms up to, and including, 6.2.1.

Is there a fix for CVE-2026-6828?

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-2026-6828 attacked?

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

Am I affected by CVE-2026-6828?

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-2026-6828: WPManageNinja Fluent Forms Stored XSS in permission_message

CVE-2026-6828 · Severity: medium · CVSS 6.4 · Published 2026-05-13

Fluent Forms is a popular WordPress plugin used to create contact forms, surveys, and quizzes. A security flaw allows users with contributor-level access or higher to inject malicious scripts into form settings. These scripts will run automatically in the browser of any user who views the affected page, potentially leading to unauthorized actions or data theft.

Technologies: WPManageNinja Fluent Forms. Vendors: WPManageNinja.

Quick answers

Is CVE-2026-6828 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-6828 being exploited in the wild.
How severe is CVE-2026-6828?: Medium severity, with a CVSS score of 6.4, published 13 May 2026.
Which products and versions are affected?: WPManageNinja Fluent Forms up to, and including, 6.2.1.
Is there a fix for CVE-2026-6828?: 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-2026-6828 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-6828?: 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 Fluent Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on the 'permission_message' parameter. This vulnerability exists in all versions up to and including 6.2.1. An authenticated attacker with contributor-level permissions or higher can inject arbitrary web scripts into the database. These scripts are then executed in the context of a user's browser whenever they visit the page where the malicious payload is rendered. This could allow for session hijacking or unauthorized administrative actions if a high-privileged user views the page.

Affected products

WPManageNinja Fluent Forms up to, and including, 6.2.1

Timeline

2026-05-13: disclosed
2026-05-13: advisory

References

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