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    CVE-2021-23401

    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.

    Published:Jul 5, 2021
    Last Modified:Nov 21, 2024
    EPS:Jul 5, 2021
    EPSS Score:0.00265
    CVSS Score:5.4

    Affected Products

    Vendor
    Flask-user Project
    Product
    Flask-user

    Exploits

    https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.pyhttps://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    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