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Open Redirect Affecting flask-user package, versions [0,]

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.11% (43rd percentile)
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NVD
6.1 medium

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  • Snyk ID SNYK-PYTHON-FLASKUSER-1293188
  • published 30 Jun 2021
  • disclosed 11 Jun 2021
  • credit Noam Moshe of Claroty
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Introduced: 11 Jun 2021

CVE-2021-23401 Open this link in a new tab
CWE-601 Open this link in a new tab
First added by Snyk

How to fix?

There is no fixed version for Flask-User.

Overview

Flask-User is a Customizable User Authorization & User Management: Register, Confirm, Login, Change username/password, Forgot password and more.

Affected versions of this package are vulnerable to Open Redirect. When using the make_safe_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 or \\\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`.