What is the CVSS score of CVE-2021-32797?

CVE-2021-32797 has a CVSS 3.1 base score of 9.6 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 2.6%.

Is there a public PoC exploit available for CVE-2021-32797?

Yes, a public proof-of-concept exploit is available for CVE-2021-32797. Prioritise patching immediately. EPSS: 2.6%.

Is there a patch available for CVE-2021-32797?

Yes, a patch is available for CVE-2021-32797. Update the affected software to the latest version immediately.

Jupyterlab CVE-2021-32797

CRITICAL

Cross-site Scripting (XSS) (CWE-79)

2021-08-09 security-advisories@github.com

RCE XSS Jupyterlab

9.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.6 CRITICAL

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Aug 09, 2021 - 21:15 nvd

CRITICAL 9.6

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

3 pypi packages depend on notebook (3 direct, 0 indirect)

Ecosystem-wide dependent count for version 6.0.0.

DescriptionNVD

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.

AnalysisAI

JupyterLab is a user interface for Project Jupyter which will eventually replace the classic Jupyter Notebook. Rated critical severity (CVSS 9.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Jupyter Jupyterlab.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.