CVE-2026-96561
HighCVSS 7.2Summary
The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin in versions up to and including 3.8.0 is vulnerable to Stored Cross-Site Scripting. A chain of missing input neutralization and output escaping across the /mwai-ui/v1/chats/submit REST endpoint, the PHP error-log parser, the Advisor task, and the Advisor dashboard widget allows an unauthenticated attacker to inject arbitrary web scripts into pages that execute when an administrator accesses the WordPress dashboard.
Risk Assessment
An unauthenticated attacker can inject malicious JavaScript that executes in an administrator's browser when they access the WordPress dashboard, potentially leading to session hijacking, data theft, or full site compromise.
Recommendation
Update the AI Engine plugin to a version later than 3.8.0 as soon as a fix is available, and in the meantime consider disabling the plugin or restricting access to the /mwai-ui/v1/chats/submit endpoint.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS