PYSEC-2021-337

    Dashboard / Vulnerabilities / PYSEC-2021-337

    PYSEC-2021-337

    Published: 5 Jul 2021Last Modified: 8 Nov 2023

    Summary:

    Details: This affects all versions of package Flask-User. 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.

    References: https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188, https://github.com/lingthio/Flask-User, https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py, https://github.com/advisories/GHSA-4298-89hc-6rfv

    Affected packages

    Package

    Name: flask-user

    Purl: pkg:pypi/flask-user

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.3
    0.3.1
    0.3.2
    0.3.3
    0.3.4
    0.3.5
    0.3.6
    0.3.7
    0.3.8

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PYSEC-2021-337 | CVE-DB