---
id: CVE-2026-15988
title: >-
  The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for
  WordPress is vulnerable to Cross-Site Request Forgery in all versions up to,
  and including, 3.6.5 This is due to missing or incorrect nonce validation on
  the reauth…
summary: >-
  The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for
  WordPress is vulnerable to Cross-Site Request Forgery in all versions up to,
  and including, 3.6.5 This is due to missing or incorrect nonce validation on
  the reauth…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-352
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15988'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.6.2/labs/mcp-oauth.php#L120
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.6.2/labs/mcp-oauth.php#L121
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.6.2/labs/mcp-oauth.php#L127
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ai-engine/tags/3.6.2/labs/mcp-oauth.php#L49
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3628188/ai-engine/trunk/labs/mcp-oauth.php
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?old_path=%2Fai-engine/tags/3.6.5&new_path=%2Fai-engine/tags/3.6.6
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/45816c45-42bc-4163-b700-a1e913f32c97?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00303
epssPercentile: 0.2051
ingestedAt: '2026-08-02T05:17:47.766Z'
---

## Overview

The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.6.5 This is due to missing or incorrect nonce validation on the reauth_for_authorize function. This makes it possible for unauthenticated attackers to create new administrator accounts with attacker-supplied credentials via a CSRF-based REST authentication bypass, granted they can trick a site administrator into performing an action such as clicking on a link. This bypass can be combined with WordPress's ?_method=POST method-override support to convert a top-navigation GET request into an authenticated POST to the REST users endpoint, requiring no existing account on the attacker's part.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.