{
  "id": "CVE-2021-23953",
  "sourceIdentifier": "security@mozilla.org",
  "published": "2021-02-26T03:15:13.433",
  "lastModified": "2021-03-03T21:05:28.460",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7."
    },
    {
      "lang": "es",
      "value": "Si un usuario hace clic en un PDF dise\u00f1ado espec\u00edficamente, el lector de PDF podr\u00eda confundirse y filtrar informaci\u00f3n de origen cruzado, cuando dicha informaci\u00f3n es servida como datos fragmentados.&#xa0;Esta vulnerabilidad afecta a Firefox versiones anteriores a 85, Thunderbird versiones anteriores a 78,7 y Firefox ESR versiones anteriores a 78,7"
    }
  ],
  "metrics": {
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        "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:L/I:N/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
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      }
    ],
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          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
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  "references": [
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1683940",
      "source": "security@mozilla.org",
      "tags": [
        "Issue Tracking",
        "Permissions Required",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2021-03/",
      "source": "security@mozilla.org",
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    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2021-04/",
      "source": "security@mozilla.org",
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      "url": "https://www.mozilla.org/security/advisories/mfsa2021-05/",
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}