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CVE-2019-19916

Estado: ModificadaMedia (6.1)—

In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.

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 (1)

Midori-browser — Midori

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2019-19916",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "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,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
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        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/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"
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        "impactScore": 2.7,
        "exploitabilityScore": 2.8
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  },
  "affected": [
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      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
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  "published": "2019-12-20T16:15:12.233",
  "references": [
    {
      "url": "https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
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      "source": "cve@mitre.org"
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      "tags": [
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    },
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      "url": "https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md",
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      "url": "https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs",
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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": "In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript."
    },
    {
      "lang": "es",
      "value": "En Midori Browser versión 0.5.11 (en Windows 10), Content Security Policy (CSP) no se aplica correctamente a todas las partes del contenido multiparte enviado con el tipo MIME multipart/x-mixed-replace. Esto podría resultar en que un script se ejecute donde CSP debería haberlo bloqueado, permitiendo un ataque de tipo cross-site scripting (XSS) y otros ataques cuando el producto renderiza el contenido como HTML. Remediando esto también necesitaría considerar el caso políglota, por ejemplo, un archivo que es una imagen GIF válida y también un JavaScript válido."
    }
  ],
  "lastModified": "2026-06-17T02:27:26.757",
  "configurations": [
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  "sourceIdentifier": "cve@mitre.org"
}