SB2021110429 - Insufficient Session Expiration in jupyterhub

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021110429

SB2021110429 - Insufficient Session Expiration in jupyterhub

Published: November 4, 2021 Updated: April 28, 2026

Security Bulletin ID SB2021110429
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Insufficient Session Expiration (CVE-ID: CVE-2021-41247)

CWE-ID: CWE-613 - Insufficient Session Expiration

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to regain access to the single-user server after logout.

The vulnerability exists due to insufficient session expiration in the JupyterHub single-user server session handling when logging out with another active JupyterLab session open in the same browser session. A remote user can keep multiple JupyterLab tabs open and log out in one tab to regain access to the single-user server after logout.

The issue affects fresh credentials for the single-user server only, not the Hub.


Remediation

Install update from vendor's website.

References