CVE-2020-15110

Name: CVE-2020-15110
Creator: NVD / NIST
Published: 2020-07-17T21:15:12.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2020-15110 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. In jupyterhub-kubespawner before 0.12, certain usernames will be able to craft particular server names which will grant them access to the default server of other users who have matching usernames. This has been fixed in 0.12.. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

Description

In jupyterhub-kubespawner before 0.12, certain usernames will be able to craft particular server names which will grant them access to the default server of other users who have matching usernames. This has been fixed in 0.12.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.89%

54.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Jupyterhub	Kubespawner	< 0.12

References

https://github.com/jupyterhub/kubespawner/commit/3dfe870a7f5e98e2e398b01996ca6b8eff4bb1d0Patch, Third Party Advisory
https://github.com/jupyterhub/kubespawner/security/advisories/GHSA-v7m9-9497-p9grExploit, Third Party Advisory
https://github.com/jupyterhub/kubespawner/commit/3dfe870a7f5e98e2e398b01996ca6b8eff4bb1d0Patch, Third Party Advisory
https://github.com/jupyterhub/kubespawner/security/advisories/GHSA-v7m9-9497-p9grExploit, Third Party Advisory

Timeline

Published: Jul 17, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15110?

How severe is CVE-2020-15110?

CVE-2020-15110 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15110?

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-2020-15110?

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

Scan your code now

Source: NVD / NIST