How severe is CVE-2020-36191?

CVE-2020-36191 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-36191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36191?

CVE-2020-36191 affects Jupyter Jupyterhub. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36191?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-36191 published?

CVE-2020-36191 was published on 2021-01-13 and last updated on 2026-06-17.

CVE-2020-36191

CVE-2020-36191 is a medium-severity vulnerability in Jupyter Jupyterhub with a CVSS 3.x base score of 4.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 4.5)
CVSS v2: 3.5
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Jupyter Jupyterhub
Published: 2021-01-13
Last modified: 2026-06-17

Description

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).

Frequently asked questions

What is CVE-2020-36191?: 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).
How severe is CVE-2020-36191?: CVE-2020-36191 has a CVSS 3.x base score of 4.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-36191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36191?: CVE-2020-36191 affects Jupyter Jupyterhub. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36191?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-36191 published?: CVE-2020-36191 was published on 2021-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jupyter:jupyterhub:1.1.0:-:*:*:*:*:*:*

More vulnerabilities in Jupyter Jupyterhub

CVE-2024-28233 — High (CVSS 8.1): JupyterHub is an open source multi-user server for Jupyter notebooks. By tricking a user into visiting a malicious…
CVE-2024-41942 — High (CVSS 7.2): JupyterHub is software that allows one to create a multi-user server for Jupyter notebooks. Prior to versions 4.1.6 and…
CVE-2026-33709 — Medium (CVSS 6.1): JupyterHub is software that allows one to create a multi-user server for Jupyter notebooks. Prior to version 5.4.4, an…
CVE-2019-10255 — Medium (CVSS 6.1): An Open Redirect vulnerability for all browsers in Jupyter Notebook before 5.7.7 and some browsers (Chrome, Firefox) in…
CVE-2026-40864 — Medium (CVSS 5.4): JupyterHub is software that allows users to create a multi-user server for Jupyter notebooks. In versions 4.1.0 through…
CVE-2021-41247 — Low (CVSS 3.5): JupyterHub is an open source multi-user server for Jupyter notebooks. In affected versions users who have multiple…

All CVEs affecting Jupyter Jupyterhub →

Other CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities

CVE-2025-32642 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in appsbd Vite Coupon vite-coupon allows Remote Code Inclusion.This…
CVE-2025-23922 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in Harsh iSpring Embedder embed-ispring allows Upload a Web Shell to a…
CVE-2017-5145 — Critical (CVSS 10.0): An issue was discovered in Carlo Gavazzi VMU-C EM prior to firmware Version A11_U05, and VMU-C PV prior to firmware…
CVE-2019-25729 — Critical (CVSS 9.8): PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute…
CVE-2025-48340 — Critical (CVSS 9.8): Cross-Site Request Forgery (CSRF) vulnerability in Danny Vink User Profile Meta Manager user-profile-meta allows…
CVE-2025-2907 — Critical (CVSS 9.8): The Order Delivery Date WordPress plugin before 12.3.1 does not have authorization and CSRF checks when importing…

Browse all CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities →