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CVE-2021-32797— JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>

CVSS 7.4 · High EPSS 0.87% · P75
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I. Basic Information for CVE-2021-32797

Vulnerability Information
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Vulnerability Title
JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>
Source: NVD (National Vulnerability Database)
Vulnerability Description
JupyterLab is a user interface for Project Jupyter which will eventually replace the classic Jupyter Notebook. In affected versions untrusted notebook can execute code on load. In particular JupyterLab doesn’t sanitize the action attribute of html `<form>`. Using this it is possible to trigger the form validation outside of the form itself. This is a remote code execution, but requires user action to open a notebook.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
Jupyter Notebook 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jupyter Notebook是一套用于创建、共享代码和说明性文本文档的开源Web应用程序。 Jupyter Notebook存在跨站脚本漏洞，该漏洞源于在受影响的版本中，不受信任的笔记可以在加载时执行代码，Jupyter Notebook没有清理html的<form>的action属性。攻击者使用此方法可以在表单本身之外触发表单验证，从而实现远程代码执行。
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)

Affected Products

VendorProductAffected VersionsCPESubscribe
jupyterlabjupyterlab >= 3.1.0, < 3.1.4 -

II. Public POCs for CVE-2021-32797

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6639 chars
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III. Intelligence Information for CVE-2021-32797

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IV. Related Vulnerabilities

Same product: jupyterlab
Same vendor: jupyterlab
Same weakness: CWE-79

V. Comments for CVE-2021-32797

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