PyPi: Jupyter-Server-Proxy

CVE-2024-35225

Safety vulnerability ID: 71837

This vulnerability was reviewed by experts

The information on this page was manually curated by our Cybersecurity Intelligence Team.

Created at Jun 11, 2024 Updated at Mar 07, 2025
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Advisory

Affected versions of Jupyter Server Proxy allow users to run arbitrary external processes alongside their notebook server and provide authenticated web access to them. A reflected cross-site scripting (XSS) issue exists in the /proxy endpoint, which accepts a host path segment in the format /proxy/<host>. When called with an invalid host value, jupyter-server-proxy replies with a response that includes the value of host without sanitization. This allows a third-party actor to send a phishing link with an invalid host value containing custom JavaScript to a user. When the user clicks the link, the browser renders the response, running the custom JavaScript. This issue permits extensive access to the user's JupyterLab instance for an actor. Patches are available, and as a workaround, server operators can disable the jupyter-server-proxy extension.

Affected package

jupyter-server-proxy

Latest version: 4.4.0

A Jupyter server extension to run additional processes and proxy to them that comes bundled JupyterLab extension to launch pre-defined processes.

Affected versions

Fixed versions

Vulnerability changelog

This vulnerability has no description

Resources

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Severity Details

CVSS Base Score

MEDIUM 6.1

CVSS v3 Details

MEDIUM 6.1
Attack Vector (AV)
NETWORK
Attack Complexity (AC)
LOW
Privileges Required (PR)
NONE
User Interaction (UI)
REQUIRED
Scope (S)
CHANGED
Confidentiality Impact (C)
LOW
Integrity Impact (I)
LOW
Availability Availability (A)
NONE