{
  "id": "CVE-2021-23974",
  "sourceIdentifier": "security@mozilla.org",
  "published": "2021-02-26T02:15:13.320",
  "lastModified": "2022-05-23T19:07:40.827",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "The DOMParser API did not properly process '<noscript>' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86."
    },
    {
      "lang": "es",
      "value": "La API DOMParser no proces\u00f3 apropiadamente los elementos \"(noscript)\" para escapar.&#xa0;Esto podr\u00eda ser usado como un vector mXSS para omitir un Sanitizador HTML.&#xa0;Esta vulnerabilidad afecta a Firefox versiones anteriores a 86"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.3
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
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  "references": [
    {
      "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1528997%2C1683627",
      "source": "security@mozilla.org",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ]
    },
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      "url": "https://security.gentoo.org/glsa/202104-10",
      "source": "security@mozilla.org",
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        "Third Party Advisory"
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    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2021-07/",
      "source": "security@mozilla.org",
      "tags": [
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        "Vendor Advisory"
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    }
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}