CVE-2021-32862

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

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).

Affected

jupyter · nbconvert

CVSS v3.1 NVD

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 GITHUB

7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

1.48% chance of exploitation in the next 30 days, 73rd percentile

Published

2022-08-18

Updated

2024-09-02

Proof-of-concept exploits (2)

• jupyter/nbconvert/security/advisories/GHSA-9jmq-rx5f-8jwq
• advisories/GHSA-9jmq-rx5f-8jwq

Security advisories

• https://lists.debian.org/debian-lts-announce/2023/06/msg00003.html

References

• CVE Record
• NVD entry