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CVE-2018-19351

6.1 · MEDIUM

Jupyter Notebook before 5.7.1 allows XSS via an untrusted notebook because nbconvert responses are considered to have the same origin as the notebook server.

Published Nov 18, 2018CWE-79EPSS 1.51%

Overview

CVE-2018-19351 is a medium-severity vulnerability. It was published on November 18, 2018 and has a CVSS 3.0 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Jupyter Notebook before 5.7.1 allows XSS via an untrusted notebook because nbconvert responses are considered to have the same origin as the notebook server. In other words, nbconvert endpoints can execute JavaScript with access to the server API. In notebook/nbconvert/handlers.py, NbconvertFileHandler and NbconvertPostHandler do not set a Content Security Policy to prevent this.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/jupyter/notebook/blob/master/docs/source/changelog.rstGitHubgithub.com/jupyter/notebook/commit/107a89fce5f413fb5728c1c5d2c7788e1fb17491Refgroups.google.com/forum/#%21topic/jupyter/hWzu2BSsplYReflists.debian.org/debian-lts-announce/2020/11/msg00033.htmlRefpypi.org/project/notebook/#historyGitHubgithub.com/jupyter/notebook/blob/master/docs/source/changelog.rstGitHubgithub.com/jupyter/notebook/commit/107a89fce5f413fb5728c1c5d2c7788e1fb17491Refgroups.google.com/forum/#%21topic/jupyter/hWzu2BSsplYReflists.debian.org/debian-lts-announce/2020/11/msg00033.htmlRefpypi.org/project/notebook/#history

How CyberStrike helps

Frequently asked questions

What is CVE-2018-19351?

CVE-2018-19351 is a medium-severity vulnerability. It was published on November 18, 2018 and has a CVSS 3.0 base score of 6.1 (MEDIUM).

How severe is CVE-2018-19351?

This vulnerability has a CVSS 3.0 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-19351?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-19351?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-19351 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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