CVE-2026-96561 json
AI Engine <= 3.8.0 - Unauthenticated Stored Cross-Site Scripting via 'model_' Parameter → PHP Error-Log Injection → Advisor Indirect Prompt Injection
published 2026-10-01 39 d ago modified 2026-10-01 39 d ago also EUVD-2026-90465
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
The 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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 39 d ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- tigroumeow AI Engine – The Chatbot, AI Framework & MCP for WordPress
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/910e51da-6ee2-45d5-837b-7fea80f79390?source=cve
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/modules/advisor.php#L216
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/modules/advisor.php#L162
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/modules/advisor.php#L156
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/common/helpers.php#L251
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/modules/chatbot.php#L299
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/engines/core.php#L533
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/query/base.php#L360
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/modules/chatbot.php#L597
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/rest.php#L464
- plugins.trac.wordpress.org /browser/ai-engine/tags/3.8.0/classes/modules/chatbot.php#L122
- plugins.trac.wordpress.org /changeset?old_path=%2Fai-engine%2Ftags%2F3.8.0&new_path=%2Fai-engine%2Ftags%2F3.8.1
Sources
- CVE List CVE-2026-96561
- NVD CVE-2026-96561
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.