CVE-2021-32798

CRITICALCVSS 9.6/10EPSS 2.11%

Last modified

CVE-2021-32798 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. The Jupyter notebook is a web-based notebook environment for interactive computing. In affected versions untrusted notebook can execute code on load. EPSS estimates a 2.11% chance of exploitation in the next 30 days.

Description

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 public Caja bypass can be used to trigger an XSS when a victim opens a malicious ipynb document in Jupyter Notebook. The XSS allows an attacker to execute arbitrary code on the victim computer using Jupyter APIs.

Metrics

CVSS 3.1
9.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS Probability
2.11%

79.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
JupyterNotebook>= 5.7.0, < 5.7.11
JupyterNotebook6.4.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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 public Caja bypass can be used to trigger an XSS when a victim opens a malicious ipynb document in Jupyter Notebook. The XSS allows an attacker to execute arbitrary code on the victim computer using Jupyter APIs.
How severe is CVE-2021-32798?
CVE-2021-32798 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 2.11% probability of exploitation in the next 30 days.
How do I fix CVE-2021-32798?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32798?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST