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CVE-2021-43544

Estado: ModificadaMedia (6.1)—

Cuando se recibía una URL mediante una intención de SEND, Firefox habría buscado el texto, pero los usos posteriores de la barra de direcciones podrían haber causado que la URL se cargara involuntariamente, lo que podría conllevar a ataques de tipo XSS y de suplantación de identidad. *Este bug sólo afecta a Firefox para Android. Otros sistemas operativos no están afectados*. Esta vulnerabilidad afecta a Firefox versiones anteriores a 95

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)

Mozilla — Firefox

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-43544",
  "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,
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        "obtainAllPrivilege": false,
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
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  "affected": [
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      "source": "security@mozilla.org",
      "affectedData": [
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  "published": "2021-12-08T22:15:09.997",
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1739934",
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      "url": "https://www.mozilla.org/security/advisories/mfsa2021-52/",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-79"
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  ],
  "descriptions": [
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      "lang": "en",
      "value": "When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95."
    },
    {
      "lang": "es",
      "value": "Cuando se recibía una URL mediante una intención de SEND, Firefox habría buscado el texto, pero los usos posteriores de la barra de direcciones podrían haber causado que la URL se cargara involuntariamente, lo que podría conllevar a ataques de tipo XSS y de suplantación de identidad. *Este bug sólo afecta a Firefox para Android. Otros sistemas operativos no están afectados*. Esta vulnerabilidad afecta a Firefox versiones anteriores a 95"
    }
  ],
  "lastModified": "2026-06-17T04:11:06.360",
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