Shodan
Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-41194

FirstUseAuthenticator is a JupyterHub authenticator that helps new users set their password on their first login to JupyterHub. When JupyterHub is used with FirstUseAuthenticator, a vulnerability in versions prior to 1.0.0 allows unauthorized access to any user's account if `create_users=True` and the username is known or guessed. One may upgrade to version 1.0.0 or apply a patch manually to mitigate the vulnerability. For those who cannot upgrade, there is no complete workaround, but a partial mitigation exists. One can disable user creation with `c.FirstUseAuthenticator.create_users = False`, which will only allow login with fully normalized usernames for already existing users prior to jupyterhub-firstuserauthenticator 1.0.0. If any users have never logged in with their normalized username (i.e. lowercase), they will still be vulnerable until a patch or upgrade occurs.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 57.0%
CVSS Severity
CVSS v3 Score 9.1
CVSS v2 Score 6.8
Products affected by CVE-2021-41194


Products
Pricing
Contact Us

Shodan ® - All rights reserved