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CVE-2020-26232 — Open redirect in Jupyter Server

Affected: jupyter_server

Jupyter Server before version 1.0.6 has an Open redirect vulnerability. A maliciously crafted link to a jupyter server could redirect the browser to a different website. All jupyter servers are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may appear safe, but ultimately redirect to a spoofed server on the public internet.

GHSA-grfj-wjv9-4f9v — Open redirect in Jupyter Server

Affected: PyPI: jupyter-server

### Impact _What kind of vulnerability is it? Who is impacted?_

Open redirect vulnerability - a maliciously crafted link to a jupyter server could redirect the browser to a different website.

All jupyter servers are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may *appear* safe, but ultimately redirect to a spoofed server on the public internet.

This originated in jupyter/notebook: https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh

### Patches

_Has the problem been patched? What versions should users upgrade to?_

jupyter_server 1.0.6

### References

[OWASP page on open redirects](https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html)

### For more information

If you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list [security@ipython.org](mailto:security@ipython.org).

Credit: zhuonan li of Alibaba Application Security Team

PYSEC-2020-234

Affected: PyPI: jupyter-server