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CVE-2021-22881

Estado: ModificadaMedia (6.1)—

The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Fedoraproject — FedoraRubyonrails — Rails

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-22881",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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  "published": "2021-02-11T18:15:17.460",
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      "lang": "en",
      "value": "The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website."
    },
    {
      "lang": "es",
      "value": "El middleware de Autorización de Host en Action Pack versiones anteriores a 6.1.2.1, 6.0.3.5 sufre una vulnerabilidad de redireccionamiento abierto. Los encabezados \"Host\" especialmente diseñados en combinación con determinados formatos \"allowed host\" pueden causar que el middleware de Autorización del Host en Action Pack redireccione a los usuarios a un sitio web malicioso. Las aplicaciones afectadas habrán permitido hosts con un punto inicial. Cuando un host permitido contiene un punto inicial, un encabezado \"Host\" especialmente diseñado puede ser usado para redireccionar hacia un sitio web malicioso"
    }
  ],
  "lastModified": "2026-06-17T03:37:56.390",
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