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CVE-2018-5175

Estado: ModificadaMedia (6.1)—

Un mecanismo para omitir las protecciones de la Política de Seguridad de Contenidos (CSP) en sitios que tienen una política "script-src" de "strict-dynamic". Si un sitio web objetivo contiene una vulnerabilidad de inyección HTML, el atacante podría inyectar una referencia a una copia de la librería "require.js" que forma parte de las herramientas de desarrollo de Firefox y, a continuación, utilizar una técnica conocida que utilice dicha librería para omitir las restricciones del CSP sobre la ejecución de scripts inyectados. Esta vulnerabilidad afecta a las versiones anteriores a la 60 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-2018-5175",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 4.3,
          "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"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
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          "scope": "CHANGED",
          "version": "3.0",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
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  "affected": [
    {
      "source": "security@mozilla.org",
      "affectedData": [
        {
          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
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              "versionType": "custom"
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  "published": "2018-06-11T21:29:16.030",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A mechanism to bypass Content Security Policy (CSP) protections on sites that have a \"script-src\" policy of \"'strict-dynamic'\". If a target website contains an HTML injection flaw an attacker could inject a reference to a copy of the \"require.js\" library that is part of Firefox's Developer Tools, and then use a known technique using that library to bypass the CSP restrictions on executing injected scripts. This vulnerability affects Firefox < 60."
    },
    {
      "lang": "es",
      "value": "Un mecanismo para omitir las protecciones de la Política de Seguridad de Contenidos (CSP) en sitios que tienen una política \"script-src\" de \"strict-dynamic\". Si un sitio web objetivo contiene una vulnerabilidad de inyección HTML, el atacante podría inyectar una referencia a una copia de la librería \"require.js\" que forma parte de las herramientas de desarrollo de Firefox y, a continuación, utilizar una técnica conocida que utilice dicha librería para omitir las restricciones del CSP sobre la ejecución de scripts inyectados. Esta vulnerabilidad afecta a las versiones anteriores a la 60 de Firefox."
    }
  ],
  "lastModified": "2026-06-17T01:59:46.243",
  "configurations": [
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