VulnCrest
Search
Create account
Report an incident
Radar sectionsDatabase
Check my site
WordPress plugin

AI Engine – The Chatbot, AI Framework & MCP for WordPress <= 3.8.6 — Missing Authorization to Administrator Account Takeover via Unauthenticated MCP OAuth Client Registration

CVE-2026-110732Published · Updated

Action summary

Affected: ≤3.8.6Update to 3.8.7 or newer

All remediation steps
Watch plugin
Severity
High7.5
CVSS
7.5
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:H Attack complexity
High
PR:N Privileges required
None
UI:R User interaction
Required
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-862 Missing Authorization
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini ai-engine

  1. Affected≤ 3.8.6
  2. Patched in3.8.7

Update to 3.8.7 or newer.

You are affected if you run ≤ 3.8.6. Version 3.8.7 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 3.8.7, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to satoshigpt2021-sketch.

The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.8.6 This is due to the MCP module's OAuth 2.1 Dynamic Client Registration endpoint (/wp-json/mcp/v1/oauth/register) being registered with a permission_callback of __return_true, allowing an unauthenticated user to register an active OAuth client with an attacker-controlled redirect URI. This makes it possible for unauthenticated attackers to obtain an administrator-bound MCP access token, and thereby full administrator-level control through the MCP tools (including user creation and option updates), once an administrator approves the attacker's client on the OAuth consent screen. The consent page is additionally served without X-Frame-Options or Content-Security-Policy frame-ancestors, so that approval can be obtained via clickjacking.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini

All 46
More vulnerabilities in AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting
≤3.9.1Update to 3.9.2
CVE-2026-123478
Medium4.3Cross-Site Request Forgery
≤3.8.8Update to 3.8.9
CVE-2026-65566
Medium4.2Authenticated (Subscriber+) Limited Media File Deletion via 'metadata' Parameter
≤3.8.4Update to 3.8.5
CVE-2026-107745
Medium4.3Missing Authorization
≤3.8.6Update to 3.8.7
CVE-2026-112828
Low2.7Missing Authorization
≤3.8.5Update to 3.8.6
CVE-2026-110982

Same weakness (Missing Authorization)

All Missing Authorization
Other Missing Authorization vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 7.5

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

How we use these sources

Search VulnCrest Radar

Jump to

Are you sure?