Reflected XSS in marimo Notebook Page

Compliance Impact

The vulnerability in marimo before 0.23.9 is a reflected cross-site scripting (XSS) issue that allows unauthenticated attackers to inject arbitrary JavaScript into the notebook page. This can lead to unauthorized actions or data exposure within the affected application.

Such vulnerabilities can impact compliance with standards like GDPR and HIPAA because they may enable attackers to access or manipulate sensitive personal or health information, violating data protection and privacy requirements.

However, specific impacts on compliance depend on the context of how marimo is used and what data it processes. The CVE description does not provide explicit information on compliance implications.

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Executive Summary

This vulnerability exists in marimo versions before 0.23.9 and is a reflected cross-site scripting (XSS) issue on the notebook page.

It allows unauthenticated attackers to inject arbitrary JavaScript code by exploiting improper escaping of single quotes in the file query parameter, which is reflected into an inline JavaScript string literal.

Attackers can craft a malicious link with a payload starting with __new__ to bypass the 404 error check and inject JavaScript that executes without Content-Security-Policy restrictions in the victim's marimo server origin.

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Impact Analysis

This vulnerability can allow attackers to execute arbitrary JavaScript in the context of the victim's marimo server.

Because the injected script runs without Content-Security-Policy restrictions, attackers could potentially steal sensitive information, hijack user sessions, perform actions on behalf of the user, or deliver malicious payloads.

Since the attack requires only a crafted link and no authentication, it poses a risk to any user who clicks such a link.

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