# CVE-2018-21030: jupyter-notebook: Jupyter Notebook before 5.5.0 does not use a CSP header to treat served files as belonging to a separate origin

CVE-2018-21030 is fixed in 3 products on 1 platform, first by jupyter-notebook 5.2.2-1ubuntu0.1, released March 31, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-21030
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0144
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 31, 2019

## Description

Jupyter Notebook before 5.5.0 does not use a CSP header to treat served files as belonging to a separate origin. Thus, for example, an XSS payload can be placed in an SVG document.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | jupyter-notebook Ubuntu 18.04.6 LTS (bionic) | 5.2.2-1ubuntu0.1 | [jupyter-notebook 5.2.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-jupyter-notebook-5.2.2-1ubuntu0.1.md) | Mar 31, 2022 |
| Linux | python-notebook Ubuntu 18.04.6 LTS (bionic) | 5.2.2-1ubuntu0.1 | [python-notebook 5.2.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-notebook-5.2.2-1ubuntu0.1.md) | Mar 31, 2022 |
| Linux | python3-notebook Ubuntu 18.04.6 LTS (bionic) | 5.2.2-1ubuntu0.1 | [python3-notebook 5.2.2-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-notebook-5.2.2-1ubuntu0.1.md) | Mar 31, 2022 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo