CVE-2021-32797

Public Exploit
JupyterLab: XSS due to lack of sanitization of the action attribute of an html

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.

Category

7.4
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.48%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: jupyterlab jupyterlab
Published at:
Updated at:

References

Link Tags
https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-4952-p58q-6crx third party advisory
https://github.com/jupyterlab/jupyterlab/commit/504825938c0abfa2fb8ff8d529308830a5ae42ed third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-32797?
CVE-2021-32797 has been scored as a high severity vulnerability.
How to fix CVE-2021-32797?
To fix CVE-2021-32797, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32797 being actively exploited in the wild?
It is possible that CVE-2021-32797 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32797?
CVE-2021-32797 affects jupyterlab jupyterlab.
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