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CVE-2018-12399

Estado: ModificadaMedia (4.3)—

Cuando se registra un nuevo manipulador de protocolos, la API acepta un argumento de títulos que puede utilizarse para engañar a los usuarios para que duden sobre el dominio que está registrando el nuevo protocolo. Esto puede provocar que el usuario apruebe un manipulador de protocolo que normalmente no tendría. Esta vulnerabilidad afecta a las versiones anteriores a la 63 de Firefox.

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)

Canonical — Ubuntu LinuxMozilla — Firefox

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2018-12399",
  "cveTags": [],
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
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          "availabilityImpact": "NONE",
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          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
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              "status": "affected",
              "version": "unspecified",
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  "published": "2019-02-28T18:29:01.023",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-287"
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      ]
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  ],
  "descriptions": [
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      "lang": "en",
      "value": "When a new protocol handler is registered, the API accepts a title argument which can be used to mislead users about which domain is registering the new protocol. This may result in the user approving a protocol handler that they otherwise would not have. This vulnerability affects Firefox < 63."
    },
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    }
  ],
  "lastModified": "2026-06-17T01:37:42.810",
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