CVE-2026-11881: WPManageNinja Fluent Forms Stored XSS in Date/Time field configuration

CVE-2026-11881 · Severity: info · CVSS 6.8 · Published 2026-07-30

Fluent Forms, a popular WordPress plugin used for creating and managing website forms, contains a security vulnerability that allows certain authorized users to inject malicious scripts into forms. An attacker with basic form-management permissions (such as a Contributor) could use this to target site visitors or administrators. If an administrator views a compromised form, the attacker could potentially gain full control over the plugin's settings and data, leading to unauthorized access to sensitive information or further site manipulation.

Technologies: WPManageNinja Fluent Forms. Vendors: WPManageNinja.

Quick answers

Is CVE-2026-11881 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-11881 being exploited in the wild.
How severe is CVE-2026-11881?
Informational severity, with a CVSS score of 6.8, published 30 July 2026.
Which products and versions are affected?
WPManageNinja Fluent Forms < 6.2.6.
Is there a fix for CVE-2026-11881?
A patch was published on 2026-07-13: Fix released in version 6.2.6 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-11881 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-11881?
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

A Stored Cross-Site Scripting (XSS) vulnerability exists in the Fluent Forms WordPress plugin before version 6.2.6. The issue stems from a failure to properly sanitize and escape the 'date_config' setting within the Date/Time form field before outputting it into an inline script during form rendering. An attacker with 'Contributor' privileges (who has been delegated form-management permissions) can inject malicious JavaScript into this configuration. When a site visitor or administrator views or previews the affected form, the script executes in their browser session. This can be leveraged to perform actions on behalf of an administrator, such as escalating the attacker's privileges within the plugin to 'fluentform_full_access'. The vulnerability is fixed in version 6.2.6.

Affected products

  • WPManageNinja Fluent Forms < 6.2.6

Timeline

  • 2026-07-13: disclosed: Initial public disclosure by researcher
  • 2026-07-13: patched: Fix released in version 6.2.6
  • 2026-07-30: advisory: NVD publication date

References

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