Description
jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via "Open image in new tab". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.
References (4)
Core 4
Core References
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/
Vendor Advisory x_refsource_confirm
https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-64x5-55rw-9974
Scores
CVSS v3
4.6
EPSS
0.0063
EPSS Percentile
70.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-284
CWE-306
CWE-79
Status
published
Products (2)
jupyter/jupyter_server
< 2.7.2
pypi/jupyter-server
0 - 2.7.2PyPI
Published
Aug 28, 2023
Tracked Since
Feb 18, 2026