Open Redirect Affecting flask-unchained package, versions [,0.9.0)
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Test your applications- Snyk ID SNYK-PYTHON-FLASKUNCHAINED-1293189
- published 10 Jun 2021
- disclosed 15 May 2021
- credit Noam Moshe of Claroty
Introduced: 15 May 2021
CVE-2021-23393 Open this link in a new tabHow to fix?
Upgrade Flask-Unchained to version 0.9.0 or higher.
Overview
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 \\\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`.