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CVE-2026-110732— AI Engine – The Chatbot, AI Framework & MCP for WordPress <= 3.8.6 - Missing Authorization to Administrator Account Takeover via Unauthenticated MCP OAuth Client Registration

Quick assessment

Affected
tigroumeow AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 "AI Engine – The Chatbot, AI Framework & MCP for WordPress" 在所有 3.8.6 及以下版本中存在“缺少授权”漏洞。该漏洞源于 MCP 模块的 OAuth 2.1 动态客户端注册端点（ ）在注册时使用了 作为权限回调函数，这使得未认证用户能够注册一个包含攻击者控制的重定向 URI 的活跃 OAuth 客户端。一旦管理员在 OAuth 同意页面上批准了攻击者的客户端，未认证的攻击者即可获取与管理员绑定的 MCP 访问令牌，从而通过 M

CVSS 7.5 · High
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I. Basic Information for CVE-2026-110732

Vulnerability Information
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Vulnerability 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
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tigroumeow AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini 0 ~ 3.8.6 -

II. Public POCs for CVE-2026-110732

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III. Intelligence Information for CVE-2026-110732

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Other References for CVE-2026-110732 (8)

IV. Related Vulnerabilities

Same product: AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini
Same vendor: tigroumeow
Same weakness: CWE-862