# CVE-2026-12406: wedevs User Frontend authorization bypass in wpuf_file_del AJAX action

Source: https://junglewise.ai/threats/cve-2026-12406-wedevs-user-frontend-authorization-bypass-in-wpuf-file-del-ajax  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-09. Updated: 2026-07-09  
License: CC BY 4.0 with a link back

CVE-2026-12406 · Severity: medium · CVSS 5.3 · Published 2026-07-09

The User Frontend plugin for WordPress, which manages user registrations and frontend postings, contains a security flaw that allows unauthorized file deletion. An unauthenticated visitor can delete media files uploaded by guests or through registration forms. This could lead to the loss of important user-submitted content and disrupt site operations.

Technologies: [weDevs User Frontend](https://junglewise.ai/threats/technologies/user-frontend). Vendors: [weDevs](https://junglewise.ai/threats/vendors/wedevs).

## Quick answers

**Is CVE-2026-12406 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12406 being exploited in the wild.

**How severe is CVE-2026-12406?** Medium severity, with a CVSS score of 5.3, published 9 July 2026.

**Which products and versions are affected?** weDevs User Frontend up to, and including, 4.3.7.

**Is there a fix for CVE-2026-12406?** 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-2026-12406 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-12406?** Check whether you run weDevs User Frontend 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 WP User Frontend plugin for WordPress is vulnerable to a missing authorization check (CWE-862) in the 'wpuf_file_del' AJAX action. The vulnerability exists in all versions up to and including 4.3.7. While the plugin uses a nonce for security, this nonce is localized into publicly accessible JavaScript objects ('wpuf_upload' and 'wpuf_frontend') whenever a plugin shortcode is rendered on a page. An unauthenticated attacker can use this leaked nonce to trigger the deletion of media attachments where the 'post_author' is 0, which typically includes guest uploads and registration form attachments. A patch appears to be available in the plugin's changeset repository.

## Affected products

- wedevs User Frontend: AI Powered Frontend Posting, User Directory, Profile Builder, Membership & User Registration up to, and including, 4.3.7

## Timeline

- 2026-07-09: advisory: NVD publication date

## References

- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax.php)
- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php)
- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Ajax/Upload_Ajax.php)
- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Frontend.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.2/includes/Frontend.php)
- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax.php)
- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php)
- [https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php](https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.7/includes/Ajax/Upload_Ajax.php)

## Related threats

- [WordPress User Frontend plugin reflected XSS in field_attr parameter](https://junglewise.ai/threats/cve-2026-103962-the-user-frontend-membership-user-registration-user-profile-user)
- [User Frontend WordPress plugin reflected XSS via field_attr parameter](https://junglewise.ai/threats/cve-2026-115277-the-user-frontend-wordpress-plugin-before-4-3-14-does-not)