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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| Flask-Unchained(PyPI) | 0 | 0.9.0 | N/A |
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