Auth bypass in Jupyterhub Kubespawner
CVE-2020-15110
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.011 (64.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Jupyterhub Kubespawner — versions < 0.12
Weakness classification (CWE)
References
- github.com/jupyterhub/kubespawner/security/advisories/GHSA-v7m9-9497-p9gr (Exploit, Third Party Advisory)
- github.com/jupyterhub/kubespawner/commit/3dfe870a7f5e98e2e398b01996ca6b8eff4bb1… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15110?
- CVE-2020-15110 is a medium-severity vulnerability in Jupyterhub Kubespawner, classified under Incorrect Authorization. CVSS score: 6.8/10. Published 2020-07-17.
- How severe is CVE-2020-15110?
- Medium severity. CVSS v3 base score is 6.8 out of 10.