# CVE-2020-36191: Cross-Site Request Forgery in JupyterHub

Source: https://junglewise.ai/threats/cve-2020-36191-cross-site-request-forgery-in-jupyterhub  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-01-13  
License: CC BY 4.0 with a link back

CVE-2020-36191 · Severity: low · CVSS 3.1 · Published 2021-01-13

JupyterHub 1.1.0 allows CSRF in the admin panel via a request that lacks an _xsrf field, as demonstrated by a /hub/api/user request (to add or remove a user account).

Technologies: [jupyterhub (PyPI)](https://junglewise.ai/threats/technologies/jupyterhub). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2020-36191 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-36191 being exploited in the wild.

**How severe is CVE-2020-36191?** Low severity, with a CVSS score of 3.1, published 13 January 2021.

**Which products and versions are affected?** jupyterhub (PyPI) ECOSYSTEM:introduced=0,fixed=1.2.0b1.

**Is there a fix for CVE-2020-36191?** Yes. jupyterhub (PyPI): upgrade to 1.2.0b1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2020-36191?** Check whether you run jupyterhub (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- jupyterhub (PyPI): upgrade to 1.2.0b1 or later

  ```sh
  pip install "jupyterhub>=1.2.0b1"
  ```


## Affected products

- jupyterhub (PyPI) ECOSYSTEM:introduced=0,fixed=1.2.0b1

## Identifiers

- CVE-2020-36191
- GHSA-7xx3-qp5w-fw96
- PYSEC-2021-67

## Related threats

- [JupyterHub unauthenticated denial of service in login form handling](https://junglewise.ai/threats/cve-2026-54338-jupyterhub-unauthenticated-denial-of-service-in-login-form)
- [PYSEC-2026-1480 - Cross site scripting (XSS) in JupyterHub via Self-XSS leveraged by Cookie Tossing](https://junglewise.ai/threats/cve-2024-28233-cross-site-scripting-xss-in-jupyterhub-via-self-xss-leveraged-by)
- [PYSEC-2026-647 - Open Redirect vulnerability in jupyterhub and notebook](https://junglewise.ai/threats/cve-2019-10255-open-redirect-vulnerability-in-jupyterhub-and-notebook)
- [JupyterHub XSRF protection bypass in HTTP form endpoints](https://junglewise.ai/threats/cve-2026-40864-jupyterhub-xsrf-protection-bypass-in-http-form-endpoints)
- [Jupyter JupyterHub open redirect vulnerability](https://junglewise.ai/threats/cve-2026-33709-jupyter-jupyterhub-open-redirect-vulnerability)