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High severity · published May 17, 2026
CVE-2026-8719
AI Engine 3.4.9 - Authenticated (Subscriber+) Privilege Escalation via Missing Authorization in MCP OAuth Bearer Token
8.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AE
AI Engine – The Chatbot, AI Framework & MCP for WordPress · tigroumeow
3.4.9 · source: vendor
Affected product
AE
AI Engine – The Chatbot, AI Framework & MCP for WordPress
tigroumeow
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8719
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-8719
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3533527/ai-engine
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/0593c20d-3422-4817-9639-614254b609db?source=cve
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