Open Redirect Affecting flask-unchained Open this link in a new tab package, versions [,0.9.0)
Exploit Maturity
Proof of concept
Attack Complexity
Low
User Interaction
Required
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
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`.