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

{
    "lastseen": "",
    "description": "The AI Engine \u2013 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.",
    "published": "2026-05-17T02:27:02.277Z",
    "modified": "2026-05-17T02:27:02.277Z",
    "type": "cve",
    "title": "AI Engine 3.4.9 - Authenticated (Subscriber+) Privilege Escalation via Missing Authorization in MCP OAuth Bearer Token",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0593c20d-3422-4817-9639-614254b609db?source=cve\nhttps://plugins.trac.wordpress.org/changeset/3533527/ai-engine",
    "id": "CVE-2026-8719",
    "bulletinFamily": "",
    "cwe": [
        "CWE-269"
    ],
    "cvelist": null,
    "sourceData": "tigroumeow AI Engine \u2013 The Chatbot, AI Framework & MCP for WordPress 3.4.9",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "AI Engine \u2013 The Chatbot, AI Framework & MCP for WordPress",
    "version": "3.4.9",
    "vendor": "tigroumeow",
    "ai_description": "Privilege Escalation vulnerability due to missing WordPress capability enforcement in the MCP OAuth bearer-token authorization path",
    "ai_severity": "High",
    "ai_vendor": "tigroumeow",
    "ai_product": "AI Engine \u2013 The Chatbot, AI Framework & MCP for WordPress",
    "ai_version": "3.4.9",
    "ai_score": 8.8
}