{
  "id": "CVE-2021-23401",
  "sourceIdentifier": "report@snyk.io",
  "published": "2021-07-05T11:15:07.670",
  "lastModified": "2021-07-08T18:08:12.190",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Esto afecta a todas las versiones del paquete Flask-User. Cuando se usa la funci\u00f3n make_safe_url, es posible omitir la comprobaci\u00f3n de la URL y redirigir a un usuario a una URL arbitraria al proporcionar m\u00faltiples barras invertidas, tal y como /////evil.com/path o \\\\\\\\evil.com/path. Esta vulnerabilidad es s\u00f3lo explotable si un servidor WSGI alternativo que no sea Werkzeug  es usado, o es modificado el comportamiento predeterminado de Werkzeug usando \"autocorrect_location_header=False"
    }
  ],
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        "type": "Primary",
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          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM"
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        "exploitabilityScore": 2.8,
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    ],
    "cvssMetricV2": [
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        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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      }
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    {
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    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:flask-user_project:flask-user:*:*:*:*:*:*:*:*",
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  "references": [
    {
      "url": "https://github.com/lingthio/Flask-User",
      "source": "report@snyk.io",
      "tags": [
        "Product",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py",
      "source": "report@snyk.io",
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      "url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188",
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}