CVE-2021-32862

Public Exploit
nbconvert vulnerable to cross-site scripting (XSS) via multiple exploit paths

Description

The GitHub Security Lab discovered sixteen ways to exploit a cross-site scripting vulnerability in nbconvert. When using nbconvert to generate an HTML version of a user-controllable notebook, it is possible to inject arbitrary HTML which may lead to cross-site scripting (XSS) vulnerabilities if these HTML notebooks are served by a web server (eg: nbviewer).

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.55%
Third-Party Advisory github.com Third-Party Advisory debian.org
Affected: jupyter nbconvert
Published at:
Updated at:

References

Link Tags
https://github.com/jupyter/nbconvert/security/advisories/GHSA-9jmq-rx5f-8jwq third party advisory exploit
https://github.com/jupyter/nbviewer/security/advisories/GHSA-h274-fcvj-h2wm broken link
https://lists.debian.org/debian-lts-announce/2023/06/msg00003.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2024/09/msg00004.html

Frequently Asked Questions

What is the severity of CVE-2021-32862?
CVE-2021-32862 has been scored as a high severity vulnerability.
How to fix CVE-2021-32862?
To fix CVE-2021-32862, 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-2021-32862 being actively exploited in the wild?
It is possible that CVE-2021-32862 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32862?
CVE-2021-32862 affects jupyter nbconvert.
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