Vulnerability-Lookup

CVE-2026-110732 (GCVE-0-2026-110732)

Vulnerability from cvelistv5 – Published: 2026-10-30 06:47 – Updated: 2026-10-30 18:09

Title

AI Engine – The Chatbot, AI Framework & MCP for WordPress <= 3.8.6 - Missing Authorization to Administrator Account Takeover via Unauthenticated MCP OAuth Client Registration

Summary

The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.8.6 This is due to the MCP module's OAuth 2.1 Dynamic Client Registration endpoint (/wp-json/mcp/v1/oauth/register) being registered with a permission_callback of __return_true, allowing an unauthenticated user to register an active OAuth client with an attacker-controlled redirect URI. This makes it possible for unauthenticated attackers to obtain an administrator-bound MCP access token, and thereby full administrator-level control through the MCP tools (including user creation and option updates), once an administrator approves the attacker's client on the OAuth consent screen. The consent page is additionally served without X-Frame-Options or Content-Security-Policy frame-ancestors, so that approval can be obtained via clickjacking.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 17:32 UTC

CWE

CWE-862 - Missing Authorization

Assigner

Wordfence CNA under the mitre root

CNA scorecard C 65/100 over 2401 records in the last 180 days details

References

8 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/ai-eng…
https://plugins.trac.wordpress.org/browser/ai-eng…
https://plugins.trac.wordpress.org/browser/ai-eng…
https://plugins.trac.wordpress.org/browser/ai-eng…
https://plugins.trac.wordpress.org/browser/ai-eng…
https://plugins.trac.wordpress.org/changeset?repo…
https://plugins.trac.wordpress.org/changeset/3760…

Impacted products

1 product

Vendor	Product	Version	CPE status
tigroumeow	AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini	Affected: 0 , ≤ 3.8.6 (semver)	guessed

Credits

satoshigpt2021-sketch

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-110732

Vulnerability from fkie_nvd - Published: 2026-10-30 07:16 - Updated: 2026-10-30 19:18

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L1159
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L317
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L496
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L609
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp.php#L232
	security@wordfence.com	https://plugins.trac.wordpress.org/changeset/3760851/ai-engine/trunk/labs/mcp-oauth.php
	security@wordfence.com	https://plugins.trac.wordpress.org/changeset?reponame=&new=3760852%40ai-engine%2Ftags%2F3.8.7&old=3757660%40ai-engine%2Ftags%2F3.8.6
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/eb115a8a-35f8-426f-bb67-4a523f67cb34?source=cve

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp.php#L232"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset/3760851/ai-engine/trunk/labs/mcp-oauth.php"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3760852%40ai-engine%2Ftags%2F3.8.7\u0026old=3757660%40ai-engine%2Ftags%2F3.8.6"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/eb115a8a-35f8-426f-bb67-4a523f67cb34?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Secondary"
    }
  ]
}

GHSA-22W7-P44P-2GQ7

Vulnerability from github – Published: 2026-10-30 09:31 – Updated: 2026-10-30 09:31

Details

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-110732"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-30T07:16:31Z",
    "severity": "HIGH"
  },
  "details": "The AI Engine \u2013 The Chatbot, AI Framework \u0026 MCP for WordPress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.8.6 This is due to the MCP module\u0027s OAuth 2.1 Dynamic Client Registration endpoint (/wp-json/mcp/v1/oauth/register) being registered with a permission_callback of __return_true, allowing an unauthenticated user to register an active OAuth client with an attacker-controlled redirect URI. This makes it possible for unauthenticated attackers to obtain an administrator-bound MCP access token, and thereby full administrator-level control through the MCP tools (including user creation and option updates), once an administrator approves the attacker\u0027s client on the OAuth consent screen. The consent page is additionally served without X-Frame-Options or Content-Security-Policy frame-ancestors, so that approval can be obtained via clickjacking.",
  "id": "GHSA-22w7-p44p-2gq7",
  "modified": "2026-10-30T09:31:24Z",
  "published": "2026-10-30T09:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110732"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L1159"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L317"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L496"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L609"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.3/labs/mcp.php#L232"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3760851/ai-engine/trunk/labs/mcp-oauth.php"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3760852%40ai-engine%2Ftags%2F3.8.7\u0026old=3757660%40ai-engine%2Ftags%2F3.8.6"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/eb115a8a-35f8-426f-bb67-4a523f67cb34?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

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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.

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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

CVE-2026-110732 (GCVE-0-2026-110732)

FKIE_CVE-2026-110732

GHSA-22W7-P44P-2GQ7

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