{
  "id": "CVE-2021-29961",
  "sourceIdentifier": "security@mozilla.org",
  "published": "2021-06-24T14:15:10.233",
  "lastModified": "2021-09-20T18:48:58.343",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "When styling and rendering an oversized `<select>` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface. This vulnerability affects Firefox < 89."
    },
    {
      "lang": "es",
      "value": "Al estilizar y renderizar un elemento \"(select)\" de gran tama\u00f1o, Firefox no aplicaba un recorte correcto que permit\u00eda a un atacante pintar sobre la interfaz de usuario. Esta vulnerabilidad afecta a Firefox versiones anteriores a 89"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
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          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
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          "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": "CWE-863"
        }
      ]
    }
  ],
  "configurations": [
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      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
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  "references": [
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1700235",
      "source": "security@mozilla.org",
      "tags": [
        "Broken Link",
        "Issue Tracking",
        "Vendor Advisory"
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      "source": "security@mozilla.org",
      "tags": [
        "Third Party Advisory"
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    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2021-23/",
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      "tags": [
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        "Vendor Advisory"
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    }
  ]
}