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CVE-2026-8719— AI Engine 3.4.9 - Authenticated (Subscriber+) Privilege Escalation via Missing Authorization in MCP OAuth Bearer Token

Quick assessment

Affected
tigroumeow AI Engine – The Chatbot, AI Framework & MCP for WordPress
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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin AI Engine 3.4.9版本存在安全漏洞，该漏洞源于MCP OAuth bearer-token授权路径缺少WordPress能力强制验证，任何有效OAuth令牌都会授予MCP访问权限而不验证管理员权限，可能导

CVSS 8.8 · High EPSS 0.44% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
tigroumeow AI Engine – The Chatbot, AI Framework & MCP for WordPress 3.4.9 affected
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I. Basic Information for CVE-2026-8719

Vulnerability Information
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Vulnerability Title
AI Engine 3.4.9 - Authenticated (Subscriber+) Privilege Escalation via Missing Authorization in MCP OAuth Bearer Token
Source: CVE Program / CVE List V5
Vulnerability Description
The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for WordPress is vulnerable to Privilege Escalation in version 3.4.9. This is due to missing WordPress capability enforcement in the MCP OAuth bearer-token authorization path, where any valid OAuth token causes MCP access to be granted without verifying administrator privileges. This makes it possible for authenticated (Subscriber+) attackers to invoke admin-level MCP tools and escalate privileges to Administrator.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin AI Engine 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin AI Engine 3.4.9版本存在安全漏洞，该漏洞源于MCP OAuth bearer-token授权路径缺少WordPress能力强制验证，任何有效OAuth令牌都会授予MCP访问权限而不验证管理员权限，可能导
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tigroumeow AI Engine – The Chatbot, AI Framework & MCP for WordPress 3.4.9 -

II. Public POCs for CVE-2026-8719

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III. Intelligence Information for CVE-2026-8719

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Vendor Advisories for CVE-2026-8719 (1)

IV. Related Vulnerabilities

Same product: AI Engine – The Chatbot, AI Framework & MCP for WordPress
Same vendor: tigroumeow
Same weakness: CWE-269

V. Comments for CVE-2026-8719

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