CVE-2026-111958 Details
Description
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.
An authentication bypass vulnerability has been identified in the Royal MCP WordPress plugin, affecting versions prior to 1.5.7. The issue arises because the plugin does not restrict a preview-link token to the specific preview for which it was issued. As a result, any party that obtains a valid token can be authenticated as the token's owning user—typically an administrator in the default configuration—across the entire REST API, without a nonce. This flaw could lead to a complete takeover of the site.
Users are advised to update to the latest version of the Royal MCP WordPress plugin.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 22, 2026CISA-ADP
Assessed Oct 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/014f061c-54f3-491e-b4a0-85cfa6fb178b/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Royal MCP | < 1.5.7 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 22, 2026 | CVE Modified | CISA-ADP |
| Oct 22, 2026 | New CVE Received | [email protected] |