User Frontend <= 4.3.13 - Unauthenticated Privilege Escalation via Restricted Shortcode Injection
- ID
- WPSEC-2026-1945
- Plugin
- User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission (wp-user-frontend)
- Affected
- all versions before 4.3.14
- Remediation
- Update to 4.3.14 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-269
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-29
- Attack surface
- User Frontend on WPSec AttackSurface
- Fix released
- Published
Description
The User Frontend plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.3.13. The restricted-shortcode check on frontend post submissions only covered rich-text fields and inspected text normalised differently from what was stored, allowing the protected [wpuf-registration] shortcode to slip through. This makes it possible for unauthenticated attackers, on forms that allow guest posting, and authenticated attackers with subscriber-level access and above, to embed the registration shortcode in a submission and use it to register a new account with a higher role such as Editor, provided user registration is enabled.
References
- https://wpsec.com/vuln/WPSEC-2026-1945/
- https://plugins.svn.wordpress.org/wp-user-frontend/tags/4.3.14/
- https://wordpress.org/plugins/wp-user-frontend/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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