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CVE-2024-35225— Jupyter Server Proxy has a reflected XSS issue in host parameter

Quick assessment

Affected
jupyterhub jupyter-server-proxy
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jupyter Server Proxy是JupyterHub开源的一个库，允许在笔记本服务器旁边运行任意外部进程。 Jupyter Server Proxy 3.2.4 之前、4.2.0 之前版本存在安全漏洞，该漏洞源于允许用户在其笔记本服务器运行任意外部进程，并为其提供经过身份验证的 Web 访问。

CVSS 9.7 · Critical EPSS 0.45% · P37
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I. Basic Information for CVE-2024-35225

Vulnerability Information
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Vulnerability Title
Jupyter Server Proxy has a reflected XSS issue in host parameter
Source: CVE Program / CVE List V5
Vulnerability Description
Jupyter Server Proxy allows users to run arbitrary external processes alongside their notebook server and provide authenticated web access to them. Versions of 3.x prior to 3.2.4 and 4.x prior to 4.2.0 have a reflected cross-site scripting (XSS) issue. The `/proxy` endpoint accepts a `host` path segment in the format `/proxy/<host>`. When this endpoint is called with an invalid `host` value, `jupyter-server-proxy` replies with a response that includes the value of `host`, without sanitization [2]. A third-party actor can leverage this by sending a phishing link with an invalid `host` value containing custom JavaScript to a user. When the user clicks this phishing link, the browser renders the response of `GET /proxy/<host>`, which runs the custom JavaScript contained in `host` set by the actor. As any arbitrary JavaScript can be run after the user clicks on a phishing link, this issue permits extensive access to the user's JupyterLab instance for an actor. Patches are included in versions 4.2.0 and 3.2.4. As a workaround, server operators who are unable to upgrade can disable the `jupyter-server-proxy` extension.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Jupyter Server Proxy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jupyter Server Proxy是JupyterHub开源的一个库，允许在笔记本服务器旁边运行任意外部进程。 Jupyter Server Proxy 3.2.4 之前、4.2.0 之前版本存在安全漏洞，该漏洞源于允许用户在其笔记本服务器运行任意外部进程，并为其提供经过身份验证的 Web 访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
jupyterhub jupyter-server-proxy >= 3.0.0, < 3.2.4 -

II. Public POCs for CVE-2024-35225

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 5965 chars
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III. Intelligence Information for CVE-2024-35225

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Patches & Fixes for CVE-2024-35225 (2)

Vendor Advisories for CVE-2024-35225 (1)

Other References for CVE-2024-35225 (1)

IV. Related Vulnerabilities

Same product: jupyter-server-proxy
Same vendor: jupyterhub
Same weakness: CWE-79

V. Comments for CVE-2024-35225

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