GHSA-33p9-3p43-82vq (CVE-2025-30167)

Details

Impact

On Windows, the shared %PROGRAMDATA% directory is searched for configuration files (SYSTEM_CONFIG_PATH and SYSTEM_JUPYTER_PATH), which may allow users to create configuration files affecting other users.

Only shared Windows systems with multiple users and unprotected %PROGRAMDATA% are affected.

Mitigations

upgrade to jupyter_core>=5.8.1 (5.8.0 is patched but breaks jupyter-server) , or
as administrator, modify the permissions on the %PROGRAMDATA% directory so it is not writable by unauthorized users, or
as administrator, create the %PROGRAMDATA%\jupyter directory with appropriately restrictive permissions, or
as user or administrator, set the %PROGRAMDATA% environment variable to a directory with appropriately restrictive permissions (e.g. controlled by administrators or the current user)

Credit

Reported via Trend Micro Zero Day Initiative as ZDI-CAN-25932

Affected Packages

jupyter_core

PyPI

Fixed in:

5.8.1

References

ADVISORY

https://github.com/advisories/GHSA-33p9-3p43-82vq

PACKAGE

https://github.com/jupyter/jupyter_core

WEB

https://github.com/jupyter/jupyter_core/commit/5e8965600adda6b416692ce7e85ecb2bd814bd52

WEB

https://github.com/jupyter/jupyter_core/security/advisories/GHSA-33p9-3p43-82vq

ADVISORY

https://nvd.nist.gov/vuln/detail/CVE-2025-30167