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Incorrect authorization in Royal MCP WordPress plugin exposes non-public posts

Priority LOW 19CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-863.

Summary

The Royal MCP WordPress plugin from 1.4.38 before 1.5.10 does not perform object-level or post-type authorisation checks in one of its search tools. An authenticated user with low privileges, such as a subscriber, can read the title and content of non-public entries, including personal data stored by a companion Royal MCP plugin. CWE-863 covers this flaw. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

The Royal MCP WordPress plugin before 1.5.10 does not perform object-level or post-type authorisation checks in one of its search tools, allowing authenticated users such as a subscriber to disclose the title and content of non-public entries, including personal data stored by a companion Royal MCP WordPress plugin before 1.5.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00206 10th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Royal MCP (Unknown): 1.5.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownRoyal MCP1.4.38 to before 1.5.101.5.10Patch availableCNA
  • Royal MCP VendorUnknown Affected 1.4.38 to before 1.5.10 Fixed in 1.5.10 Patch available CNA

Remediation

Update Royal MCP to version 1.5.10 or later, which fixes the flaw. CISA does not list this vulnerability in its Known Exploited Vulnerabilities catalog.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Royal MCP (Unknown) Fixed in 1.5.10

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Royal MCP 1.5.10

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-81706 Royal MCP plugin lets contributors read private and draft pagesPriority LOW 17

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-111960
  2. 2026-10-28 Alias added: GHSA-334j-cwwv-qmmh
  3. 2026-10-28 CVSS score added · CISA ADP
  4. 2026-10-28 Weakness changed · CISA ADP
  5. 2026-10-28 CISA SSVC decision points changed

References

Sources