CVE-2026-89141

AI Engine <= 3.7.7 - Insecure Direct Object Reference to Authenticated (Subscriber+) Sensitive Attachment Disclosure via 'mediaId' Parameter

2026-09-14 17:10
Chi Trung Huynh

Strategic Overview

Status
Patched in 3.7.8
Affected Plugin
AI Engine – The Chatbot, AI Framework & MCP for WordPress
Affected Version
<= 3.7.7
CVSS
6.5Medium
Weakness type
CWE-639 · Authorization Bypass Through User-Controlled Key
CVE
CVE-2026-89141
View all AI Engine – The Chatbot, AI Framework & MCP for WordPress vulnerabilities

At a glance

CVE-2026-89141 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the AI Engine WordPress plugin, affecting versions <= 3.7.7. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 3.7.8; sites on affected versions should update now. Disclosed September 2026, reported by Chi Trung Huynh.

Vulnerability Overview

The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.7 via the 'mediaId' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to access and retrieve the transcribed contents of private audio attachments belonging to other users, including Administrators, via a supplied attachment ID. This vulnerability requires the Public API module to be enabled in the plugin settings; when disabled, the REST route is absent and the endpoint returns HTTP 404.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-639: Authorization Bypass Through User-Controlled Key

AI Engine <= 3.7.7 carries this weakness at mediaId, and reaching it takes an account at Subscriber level or above. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For AI Engine the fix is 3.7.8: builds <= 3.7.7 are affected, anything from 3.7.8 onward is not.

Remediation

Update to version 3.7.8, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: AI Engine 3.7.8 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-89141https://www.wordfence.com/threat-intel/vulnerabilities/id/2cb2ad5d-aa92-4186-aaae-45dde4a52f30https://nvd.nist.gov/vuln/detail/CVE-2026-89141

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C