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BREW-jupyterlab-CVE-2023-40170 — cross-site inclusion (XSSI) of files in jupyter-server

Affected: Homebrew: jupyterlab

### Impact

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".

### Patches

Jupyter Server 2.7.2

### Workarounds

Use lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.

### References

Upstream patch for CVE-2019-9644 was not applied completely, leaving part of the vulnerability open.

Vulnerability reported by Tim Coen via the [bug bounty program](https://app.intigriti.com/programs/jupyter/jupyter/detail) [sponsored by the European Commission](https://commission.europa.eu/news/european-commissions-open-source-programme-office-starts-bug-bounties-2022-01-19_en) and hosted on the [Intigriti platform](https://www.intigriti.com/).

CVE-2023-40170 — cross-site inclusion (XSSI) of files in jupyter-server

Affected: jupyter-server jupyter_server

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.

GHSA-64x5-55rw-9974 — cross-site inclusion (XSSI) of files in jupyter-server

Affected: PyPI: jupyter-server