CVE-2021-23401

CWE-601 URL REDIRECTION TO UNTRUSTED SITE:
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`.

Risk Information

  • CVE ID
  • CVE-2021-23401
  • Vendor
  • Flask
  • Product
  • Flask-user
  • CVSS v3
  • 5.4