What is CVE-2026-75903?

CVE-2026-75903 is a high-severity vulnerability in Manuelgalan Vulnity Security, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-10-16.

How severe is CVE-2026-75903?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Manuelgalan Vulnity Security

CVE-2026-75903

The Vulnity Security plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 1.4.3 This is due to insufficient protection of the delegated-login pairing credential file on Nginx-based installations, where the plugin's generated server configuration snippet guards the wrong directory path. This makes it possible for unauthenticated attackers to retrieve the stored credentials, forge signed REST API requests, and log in as an administrator.

Vulnerability class: Broken Authentication

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Manuelgalan Vulnity Security

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

Frequently asked questions

What is CVE-2026-75903?: CVE-2026-75903 is a high-severity vulnerability in Manuelgalan Vulnity Security, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-10-16.
How severe is CVE-2026-75903?: High severity. CVSS v3 base score is 8.1 out of 10.