Open redirect in Jupyter Notebook

Impact

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

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

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

Patches

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

Patched in notebook 6.1.5

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