AI Engine <= 3.6.5 — Cross-Site Request Forgery to Privilege Escalation via REQUEST_URI Substring Match
CVE-2026-15988Published · Updated Action summary
Affected: ≤3.6.5Update to 3.6.6 or newer
All remediation steps- Severity
- High8.8
- CVSS
- 8.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-352 CSRF
- 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
- Affected≤ 3.6.5
- Patched in3.6.6
Update to 3.6.6 or newer.
You are affected if you run ≤ 3.6.5. Version 3.6.6 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
- Update to version 3.6.6, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- 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 UKO.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini
All 46| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤3.9.1Update to 3.9.2 | CVE-2026-123478 | |
| Medium4.3 | Cross-Site Request Forgery ≤3.8.8Update to 3.8.9 | CVE-2026-65566 | |
| High7.5 | Missing Authorization to Administrator Account Takeover via Unauthenticated MCP OAuth Client Registration ≤3.8.6Update to 3.8.7 | CVE-2026-110732 | |
| Medium4.2 | Authenticated (Subscriber+) Limited Media File Deletion via 'metadata' Parameter ≤3.8.4Update to 3.8.5 | CVE-2026-107745 | |
| Medium4.3 | Missing Authorization ≤3.8.6Update to 3.8.7 | CVE-2026-112828 |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤3.9.1Update to 3.9.2
- Medium4.3Cross-Site Request Forgery
≤3.8.8Update to 3.8.9
- High7.5Missing Authorization to Administrator Account Takeover via Unauthenticated MCP OAuth Client Registration
≤3.8.6Update to 3.8.7
- Medium4.2Authenticated (Subscriber+) Limited Media File Deletion via 'metadata' Parameter
≤3.8.4Update to 3.8.5
- Medium4.3Missing Authorization
≤3.8.6Update to 3.8.7
Same weakness (CSRF)
All CSRF| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
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- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
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ELEX WordPress HelpDesk & Customer Ticketing System
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Timeline
CVE published
Severity high, CVSS 8.8
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.