EUVD-2026-40914
GHSA-mggr-4wrj-4f4g
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Network-reachable MCP tools abusable by any authenticated low-priv (Subscriber) account, so AV:N/AC:L/PR:L/UI:N; high confidentiality and integrity but no direct availability impact.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
5DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Broken access control in the Royal MCP WordPress plugin before 1.4.26 lets any authenticated low-privileged user (e.g. Subscriber) invoke privileged MCP tools that skip capability checks after token authentication, exposing private content, full user/role enumeration, and create/modify/delete operations on other users' content. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated, token-authenticated MCP session tied to a valid WordPress account of any role, including the lowest-privileged Subscriber (per CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are largely consistent and point to a genuine priority for sites running this plugin. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers or obtains a Subscriber account on a WordPress site running Royal MCP < 1.4.26 and authenticates to the MCP interface with a token. Because capability checks are missing, they invoke MCP tools to dump all usernames and roles, read private/draft posts, and delete or tamper with other users' content - all without any admin privileges. … |
| Remediation | Vendor-released patch: upgrade the Royal MCP plugin to version 1.4.26 or later, which restores capability checks on the affected MCP tools; this is the primary and complete fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all WordPress installations using Royal MCP plugin and document current versions; assess exposure to low-privileged users (subscribers, contributors). …
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Broken access control in the Royal MCP WordPress plugin (versions up to and including 1.4.25) lets authenticated low-pri
Broken access control in the Royal MCP WordPress plugin (versions 1.4.2 and earlier) allows remote attackers to invoke p
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External POC / Exploit Code
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