What is CVE-2026-111958?

CVE-2026-111958 is a high-severity vulnerability in Royal Mcp, classified under Improper Authentication. CVSS score: 7.5/10. Published 2026-10-22.

How severe is CVE-2026-111958?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Royal Mcp

CVE-2026-111958

The Royal MCP WordPress plugin before 1.5.7 does not limit a preview-link token to the single preview it was issued for, so any party that obtains a valid token is authenticated as the token's owning user, an administrator in the default configuration, across the entire REST API with no nonce, leading to full site takeover.

Vulnerability class: Broken Authentication

Published 2026-10-22 · last modified 2026-10-22.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/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

Royal Mcp

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

wpscan.com/vulnerability/014f061c-54f3-491e-b4a0-85cfa6fb178b/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-111958?: CVE-2026-111958 is a high-severity vulnerability in Royal Mcp, classified under Improper Authentication. CVSS score: 7.5/10. Published 2026-10-22.
How severe is CVE-2026-111958?: High severity. CVSS v3 base score is 7.5 out of 10.