CVE-2026-8719— AI Engine 3.4.9 - Authenticated (Subscriber+) Privilege Escalation via Missing Authorization in MCP OAuth Bearer Token
Possible ATT&CK Techniques 2AI
T1548 · Abuse Elevation Control Mechanism T1068 · Exploitation for Privilege EscalationGet alerts for future matching vulnerabilitiesLog in to subscribe
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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权管理不恰当
Source: NVD (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
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
- CVE-2026-1400
AI Engine <= 3.3.2 - Authenticated (Editor+) Arbitrary File - CVE-2026-0746
AI Engine <= 3.3.2 - Authenticated (Subscriber+) Server-Side - CVE-2025-8084
AI Engine <= 3.1.8 - Authenticated (Editor+) Server-Side Req - CVE-2025-12844
AI Engine <= 3.1.8 - Authenticated (Subscriber+) PHP Object - CVE-2025-11749
AI Engine <= 3.1.3 - Unauthenticated Sensitive Information E
Same vendor: tigroumeow
- CVE-2026-1400
AI Engine <= 3.3.2 - Authenticated (Editor+) Arbitrary File - CVE-2026-0746
AI Engine <= 3.3.2 - Authenticated (Subscriber+) Server-Side - CVE-2025-8084
AI Engine <= 3.1.8 - Authenticated (Editor+) Server-Side Req - CVE-2025-12844
AI Engine <= 3.1.8 - Authenticated (Subscriber+) PHP Object - CVE-2025-11749
AI Engine <= 3.1.3 - Unauthenticated Sensitive Information E
Same weakness: CWE-269
- CVE-2026-45395
Open WebUI: Missing `workspace.tools` Authorization Check on - CVE-2026-45675
Open WebUI: LDAP and OAuth First-User Race Condition Allows - CVE-2026-6228
Frontend Admin by DynamiApps <= 3.28.36 - Unauthenticated Pr - CVE-2025-62625
AMD Processors 安全漏洞 - CVE-2026-5193
Essential Addons for Elementor – Popular Elementor Templates
V. Comments for CVE-2026-8719
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