AI Engine <= 3.8.0 - Unauthenticated Stored Cross-Site Scripting via 'model_' Parameter → PHP Error-Log Injection → Advisor Indirect Prompt Injection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-96561
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-01 04:18:22 UTC
Updated2026-10-01 04:18:22 UTC
DescriptionThe AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.8.0 This is due to a chain of missing input neutralization and output escaping across the /mwai-ui/v1/chats/submit REST endpoint, the PHP error-log parser (MeowKit_MWAI_Helpers::php_error_logs), the Advisor task (Meow_MWAI_Modules_Advisor::run_advisor), and the Advisor dashboard widget (advisor_metabox): the server-parameter denylist in chat_submit strips only exact key names such as 'model' while convert_keys() later canonicalizes 'model_' back to 'model', allowing an unauthenticated caller to place an attacker-controlled string (including CR/LF) into $query->model; final_checks() throws an Exception whose message embeds that raw string, and the non-streaming, non-admin catch branch writes it to the PHP error log unmodified — creating a forged log line that the plugin's own parser subsequently returns as recent PHP-error content; run_advisor() then appends that content verbatim to the AI prompt (indirect prompt injection — CWE-1427), the returned JSON is stored in the mwai_advisor_data option with no schema validation or HTML sanitization, and advisor_metabox() concatenates the resulting 'title' and 'description' values directly into the WordPress dashboard widget without esc_html(), wp_kses(), or equivalent escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator accesses the WordPress dashboard.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tigroumeow AI Engine The Chatbot AI Framework MCP For WordPress affected 3.8.0 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/modules/chatbot.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/rest.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/engines/core.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/common/helpers.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/query/base.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/910e51da-6ee2-45d5-837b-7fea8... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/modules/chatbot.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/modules/advisor.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/modules/advisor.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/modules/chatbot.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ai-engine/tags/3.8.0/classes/modules/advisor.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: whale120 (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-23T13:43:32.000ZVendor Notified
CNA2026-09-30T15:12:28.000ZDisclosed

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