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


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Proof of concept
    EPSS
    0.11% (44th percentile)

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

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`.

CVSS Scores

version 3.1
Expand this section

Snyk

5.4 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None
Expand this section

NVD

6.1 medium