Published on: 06/10/2021 12:00:00 AM UTC

Last Modified on: 06/11/2021 11:11:00 AM UTC


The following vulnerability was found:

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 \\\ 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.

CVE References

Description Tags Link
add tests for validate_redirect_url · briancappello/[email protected] · GitHub
Open Redirect in flask-unchained | Snyk

Discovery Credit

Noam Moshe of Claroty

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-23393 : This affects the package Flask-Unchained before 0.9.0. When using the the _validate_redirect_url…… 2021-06-10 23:21:45
Reddit Logo Icon /r/netcve CVE-2021-23393 2021-06-11 00:42:45
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