Vulnerability in Jupyter Jupyterhub
CVE-2021-41247
JupyterHub is an open source multi-user server for Jupyter notebooks. In affected versions users who have multiple JupyterLab tabs open in the same browser session, may see incomplete logout from the single-user server, as fresh credentials (for the single-user server only, not the Hub) reinstated after logout, if another active JupyterLab session is open while the logout takes place. Upgrade to JupyterHub 1.5. For distributed deployments, it is jupyterhub in the _user_ environment that needs patching. There are no patches necessary in the Hub environment. The only workaround is to make sure that only one JupyterLab tab is open when you log out.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (55.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Jupyter Jupyterhub
- Jupyterhub — versions >= 1.0.0, < 1.5.0 - jupyterhub (pip), < 1.2.0 - jupyterhub (helm)
Weakness classification (CWE)
References
- github.com/jupyterhub/jupyterhub/security/advisories/GHSA-cw7p-q79f-m2v7 (Third Party Advisory)
- github.com/jupyterhub/jupyterhub/commit/5ac9e7f73a6e1020ffddc40321fc53336829fe27 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-41247?
- CVE-2021-41247 is a low-severity vulnerability in Jupyter Jupyterhub, classified under Insufficient Session Expiration. CVSS score: 3.5/10. Published 2021-11-04.
- How severe is CVE-2021-41247?
- Low severity. CVSS v3 base score is 3.5 out of 10.