What is CVE-2021-32798?

CVE-2021-32798 is a critical-severity vulnerability in Jupyter Notebook, classified under Cross-site Scripting. CVSS score: 10.0/10. Published 2021-08-09.

How severe is CVE-2021-32798?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2021-32798 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Jupyter Notebook

CVE-2021-32798

The Jupyter notebook is a web-based notebook environment for interactive computing. In affected versions untrusted notebook can execute code on load. Jupyter Notebook uses a deprecated version of Google Caja to sanitize user inputs. A publ…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (38.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

Affected products

Jupyter Notebook — versions >= 6.0.0, < 6.4.1, < 5.7.11

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/jupyter/notebook/security/advisories/GHSA-hwvq-6gjx-j797 (x_refsource_CONFIRM)
github.com/jupyter/notebook/commit/79fc76e890a8ec42f73a3d009e44ef84c14ef0d5 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-32798?: CVE-2021-32798 is a critical-severity vulnerability in Jupyter Notebook, classified under Cross-site Scripting. CVSS score: 10.0/10. Published 2021-08-09.
How severe is CVE-2021-32798?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2021-32798 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.