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Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP < 1.5.7 — Authentication Bypass

CVE-2026-111958Published · Updated

Action summary

Affected: <1.5.7Update to 1.5.7 or newer

All remediation steps
Watch plugin
Severity
High7.5
CVSS
7.5
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:H Attack complexity
High
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-287 Improper Authentication
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP royal-mcp

  1. Affected< 1.5.7
  2. Patched in1.5.7

Update to 1.5.7 or newer.

You are affected if you run < 1.5.7. Version 1.5.7 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 1.5.7, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Raphael P. Cigana.

The Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP plugin for WordPress is vulnerable to Authentication Bypass in all versions up to 1.5.7 (exclusive). This makes it possible for authenticated attackers, with access to a valid token, to bypass authentication and access the full REST API.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP

All 6
More vulnerabilities in Royal MCP – Secure AI Connector for Claude, ChatGPT & any LLM via MCP
SeverityVulnerabilityCVEPublished
Medium4.3Missing Authorization
<1.5.10Update to 1.5.10
CVE-2026-111961
Medium4.31.5.9 - Missing Authorization
1.4.38 – 1.5.9Update to 1.5.10
CVE-2026-111960
Medium4.3Missing Authorization
≤1.4.25Update to 1.4.26
CVE-2026-54842
Medium5.3Missing Authorization to Unauthenticated MCP Tool Use
≤1.4.25Update to 1.4.26
CVE-2026-10750
Medium5.3Missing Authorization
≤1.4.2Update to 1.4.3
CVE-2026-40775

Timeline

  1. CVE published

    Severity high, CVSS 7.5

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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