—

PYSEC-2021-96

Quick fix

PYSEC-2021-96 — flask-unchained: upgrade to the fixed version with the command below.

pip install --upgrade 'flask-unchained>=71e36b28166f9ffbe0a991f51127f0984f7e6a40'

Details

This affects the package Flask-Unchained before 0.9.0. When using the the _validate_redirect_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/flask-unchained

Introduced in: 0Fixed in: 71e36b28166f9ffbe0a991f51127f0984f7e6a40

Fixpip install --upgrade 'flask-unchained>=71e36b28166f9ffbe0a991f51127f0984f7e6a40'

References

https://snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189[ADVISORY]
https://github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40[FIX]
https://github.com/advisories/GHSA-pjc4-3w99-j7v4[ADVISORY]