Auth bypass in Felixmartinez Users Manager – Pn
CVE-2026-4003
The Users manager – PN plugin for WordPress is vulnerable to Privilege Escalation via Arbitrary User Meta Update in all versions up to and including 1.1.15. This is due to a flawed authorization logic check in the userspn_ajax_nopriv_serve…
Vulnerability class: Broken Access Control
EPSS: 0.002 (47.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Felixmartinez Users Manager – Pn — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/27bb60c1-43fa-4a18-b9ca-05953…
- plugins.trac.wordpress.org/browser/userspn/trunk/includes/class-userspn-ajax-no…
- plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-a…
- plugins.trac.wordpress.org/browser/userspn/trunk/includes/class-userspn-ajax-no…
- plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-a…
- plugins.trac.wordpress.org/browser/userspn/trunk/includes/class-userspn-ajax-no…
- plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-a…
- plugins.trac.wordpress.org/browser/userspn/trunk/includes/class-userspn-common…
- plugins.trac.wordpress.org/browser/userspn/tags/1.0.31/includes/class-userspn-c…
- plugins.trac.wordpress.org/browser/userspn/trunk/includes/class-userspn-functio…
Frequently asked questions
- What is CVE-2026-4003?
- CVE-2026-4003 is a critical-severity vulnerability in Felixmartinez Users Manager – Pn, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-04-08.
- How severe is CVE-2026-4003?
- Critical severity. CVSS v3 base score is 9.8 out of 10.