Vulnerability-Lookup

CVE-2026-15015 (GCVE-0-2026-15015)

Vulnerability from cvelistv5 – Published: 2026-07-23 09:33 – Updated: 2026-07-23 13:45

Title

MountDev AI MCP Connector for WordPress <= 1.6.1 - Unauthenticated Privilege Escalation via OAuth Authorization Endpoint

Summary

The MountDev AI MCP Connector for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.6.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to obtain an administrator-bound OAuth Bearer token via a self-registered client, granting full administrator-equivalent access to the plugin's MCP tool surface and all exposed WordPress content, users, and options. This is exploitable by combining the publicly accessible Dynamic Client Registration endpoint, which allows unauthenticated callers to register arbitrary OAuth clients with an attacker-controlled redirect_uri, with the unprotected authorization endpoint to complete the full OAuth flow without any administrator interaction.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing Authorization

Assigner

Wordfence

References

6 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/mountd…
https://plugins.trac.wordpress.org/browser/mountd…
https://plugins.trac.wordpress.org/browser/mountd…
https://plugins.trac.wordpress.org/browser/mountd…
https://plugins.trac.wordpress.org/changeset?repo…

Impacted products

1 product

Vendor	Product	Version
cascadiawebservices	MountDev AI MCP Connector for WordPress	Affected: 0 , ≤ 1.6.1 (semver)

Credits

AeonRisk

Show details on NVD website

JSON

To clipboard

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GHSA-8G44-6RRM-MF2W

Vulnerability from github – Published: 2026-07-23 12:32 – Updated: 2026-07-23 12:32

Details

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-15015"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-23T10:16:50Z",
    "severity": "CRITICAL"
  },
  "details": "The MountDev AI MCP Connector for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.6.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to obtain an administrator-bound OAuth Bearer token via a self-registered client, granting full administrator-equivalent access to the plugin\u0027s MCP tool surface and all exposed WordPress content, users, and options. This is exploitable by combining the publicly accessible Dynamic Client Registration endpoint, which allows unauthenticated callers to register arbitrary OAuth clients with an attacker-controlled redirect_uri, with the unprotected authorization endpoint to complete the full OAuth flow without any administrator interaction.",
  "id": "GHSA-8g44-6rrm-mf2w",
  "modified": "2026-07-23T12:32:21Z",
  "published": "2026-07-23T12:32:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15015"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L188"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L370"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L474"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mountdev-ai-mcp-connector/tags/1.6.0/includes/class-oauth-controller.php#L571"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3601448%40mountdev-ai-mcp-connector\u0026new=3601448%40mountdev-ai-mcp-connector"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/ce8ec66f-5efc-4354-8871-8e35ab4e51fc?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-15015 (GCVE-0-2026-15015)

GHSA-8G44-6RRM-MF2W

Tags

Sightings

Nomenclature