AI Engine <= 3.8.6 - Authenticated (Contributor+) Missing Authorization to Live Chatbot Takeover via Embed Preview
- ID
- WPSEC-2026-1577
- Plugin
- AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini (ai-engine)
- Affected
- all versions before 3.8.7
- Remediation
- Update to 3.8.7 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-23
- Attack surface
- AI Engine on WPSec AttackSurface
- Fix released
- Published
Description
The AI Engine plugin for WordPress is vulnerable to unauthorized modification of chatbot configuration via the mwai_chatbot shortcode in all versions up to, and including, 3.8.6, due to can_override_server_params() allowing server-side parameters to be stored for a custom chatbot ID whenever no post is being rendered. This includes AJAX and REST requests such as WordPress' parse-embed preview, where shortcode text comes from the request. This makes it possible for authenticated attackers, with Contributor-level access and above, to replace a live custom chatbot's system prompt, model or API key, which affects every visitor using that chatbot.
References
- https://wpsec.com/vuln/WPSEC-2026-1577/
- https://plugins.svn.wordpress.org/ai-engine/tags/3.8.7/
- https://wordpress.org/plugins/ai-engine/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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