CVE Tools
Sign in

CVE-2021-32797

JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>

Published: Aug 9, 2021Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-79
NVD MITRE
7.4CVSSHIGH
EPSS Score
2.6%
Top 16.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-79

Affected Products

jupyterlabjupyterlab
On-prem
DevTools & CI / ide-editor
jupyterlabjupyter
Mixed
AI / ML / notebook-mlops
jupyterlabPyPIOSS Libraries
notebookPyPIOSS Libraries
jupyterlaboss-projectDevTools & CIaka jupyter lab
jupyteross-projectAI / MLaka notebook, jupyter server, jupyterlab
pypipackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-4952-p58q-6crx
github.com
https://github.com/jupyterlab/jupyterlab/commit/504825938c0abfa2fb8ff8d529308830a5ae42ed
github.com
https://github.com/google/security-research/security/advisories/GHSA-c469-p3jp-2vhx
github.com
and 2 more references View all →

Timeline

Published
Aug 9, 2021
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-32797 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows