Proof of concept
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10 Jun 2021
15 May 2021
Noam Moshe of Claroty
How to fix?
Flask-Unchained to version 0.9.0 or higher.
Flask-Unchained is a The quickest and easiest way to build large web apps and APIs with Flask and SQLAlchemy
Affected versions of this package are vulnerable to Open Redirect. 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
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`.