# CVE-2026-109214: WP User Frontend stored XSS in taxonomy field

Source: https://junglewise.ai/threats/cve-2026-109214-the-user-frontend-membership-user-registration-user-profile-user  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-07. Updated: 2026-11-07  
License: CC BY 4.0 with a link back

CVE-2026-109214 · Severity: high · CVSS 7.2 · Published 2026-11-07

The User Frontend plugin for WordPress allows site administrators to build forms for user registration, profile management, and content submission on the front-end. An unauthenticated attacker can inject malicious scripts into taxonomy fields (like post categories) when guest submission is enabled, causing the scripts to execute when other users visit affected pages. This could lead to session hijacking, account takeover, or data theft from site visitors.

Vendors: [WP User Frontend](https://junglewise.ai/threats/vendors/wp-user-frontend).

## Quick answers

**Is CVE-2026-109214 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109214 being exploited in the wild.

**How severe is CVE-2026-109214?** High severity, with a CVSS score of 7.2, published 7 November 2026.

**Which products and versions are affected?** WP User Frontend User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission up to and including 4.3.13.

**Is there a fix for CVE-2026-109214?** 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-2026-109214 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-109214?** Check whether you run WP User Frontend User Frontend – Membership, User Registration, User Profile or User Directory & Content Restriction with Frontend Post Submission 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 plugin fails to properly sanitize and escape user input in taxonomy field parameters (particularly the 'category' field) when configured in text-input mode with guest post submission enabled. An unauthenticated attacker can inject arbitrary JavaScript code that is stored in the database and executed in the browsers of any user accessing pages with the injected content. The vulnerability requires the target site to have explicitly configured a Taxonomy field in text-input mode on at least one frontend form with guest submission enabled.

## Affected products

- WP User Frontend User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission up to and including 4.3.13

## Timeline

- 2026-11-07: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/admin/form-builder/assets/js/form-builder.js](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/admin/form-builder/assets/js/form-builder.js)
- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/admin/form-builder/views/post-form-settings.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/admin/form-builder/views/post-form-settings.php)