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CVE-2019-11751

Estado: ModificadaAlta (8.8)—

Los parámetros de línea de comando relacionados con el Inicio de Sesión no son saneados apropiadamente cuando Firefox es iniciado por otro programa, tal y como cuando un usuario hace clic en enlaces maliciosos en una aplicación de chat. Esto puede ser usado para escribir un archivo de registro en una ubicación arbitraria, como en la carpeta "Startup" de Windows. <br>*Nota: este problema solo afecta a Firefox en los sistemas operativos Windows. *. Esta vulnerabilidad afecta a Firefox versiones anteriores a 69 y Firefox ESR versiones anteriores a 68.1.

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)

Mozilla — FirefoxMozilla — Firefox ESR

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2019-11751",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@mozilla.org",
      "affectedData": [
        {
          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "69",
              "versionType": "custom"
            }
          ]
        },
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          "vendor": "Mozilla",
          "product": "Firefox ESR",
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              "status": "affected",
              "version": "unspecified",
              "lessThan": "68.1",
              "versionType": "custom"
            }
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  ],
  "published": "2019-09-27T18:15:13.303",
  "references": [
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html",
      "source": "security@mozilla.org"
    },
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1572838",
      "tags": [
        "Issue Tracking",
        "Permissions Required",
        "Vendor Advisory"
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      "source": "security@mozilla.org"
    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2019-25/",
      "tags": [
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      "source": "security@mozilla.org"
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    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1572838",
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    },
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      "url": "https://www.mozilla.org/security/advisories/mfsa2019-26/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-88"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Logging-related command line parameters are not properly sanitized when Firefox is launched by another program, such as when a user clicks on malicious links in a chat application. This can be used to write a log file to an arbitrary location such as the Windows 'Startup' folder. <br>*Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1."
    },
    {
      "lang": "es",
      "value": "Los parámetros de línea de comando relacionados con el Inicio de Sesión no son saneados apropiadamente cuando Firefox es iniciado por otro programa, tal y como cuando un usuario hace clic en enlaces maliciosos en una aplicación de chat. Esto puede ser usado para escribir un archivo de registro en una ubicación arbitraria, como en la carpeta \"Startup\" de Windows. <br>*Nota: este problema solo afecta a Firefox en los sistemas operativos Windows. *. Esta vulnerabilidad afecta a Firefox versiones anteriores a 69 y Firefox ESR versiones anteriores a 68.1."
    }
  ],
  "lastModified": "2026-06-17T02:13:34.007",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "69.0"
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  "sourceIdentifier": "security@mozilla.org"
}