Royal MCP < 1.4.26 - Subscriber+ Insufficient Authorization in MCP Tools
Priority HIGH 70Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
The Royal MCP WordPress plugin before 1.4.26 does not perform capability checks on the majority of its MCP tools after token authentication, allowing authenticated users with a low-privileged role such as Subscriber to read private content, enumerate all users and their roles, and create, modify, or delete content owned by other users.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0043 37th percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Royal MCP (Unknown): 1.4.26
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Royal MCP | before 1.4.26 | 1.4.26 | Patch available | CNA |
- Royal MCP VendorUnknown Affected before 1.4.26 Fixed in 1.4.26 Patch available CNA
Remediation
- Fix · CNA Royal MCP (Unknown) Fixed in 1.4.26
Timeline
- 2026-10-02 Threatist record created from CVE-2026-10750
- 2026-10-03 Alias added: GHSA-mggr-4wrj-4f4g
References
Sources
- CVE-2026-10750 · CVE Program
- CVE-2026-10750 · NVD
- FIRST EPSS
- GHSA-mggr-4wrj-4f4g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences