{
  "id": "CVE-2021-41264",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2021-11-12T18:15:07.733",
  "lastModified": "2021-11-15T15:01:51.643",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenZeppelin Contracts is a library for smart contract development. In affected versions upgradeable contracts using `UUPSUpgradeable` may be vulnerable to an attack affecting uninitialized implementation contracts. A fix is included in version 4.3.2 of `@openzeppelin/contracts` and `@openzeppelin/contracts-upgradeable`. For users unable to upgrade; initialize implementation contracts using `UUPSUpgradeable` by invoking the initializer function (usually called `initialize`). An example is provided [in the forum](https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301)."
    },
    {
      "lang": "es",
      "value": "OpenZeppelin Contracts es una biblioteca para el desarrollo de contratos inteligentes. En las versiones afectadas, los contratos actualizables que usan \"UUPSUpgradeable\" pueden ser vulnerables a un ataque que afecta a los contratos de implementaci\u00f3n no inicializada. Se incluye una correcci\u00f3n en la versi\u00f3n 4.3.2 de \"@openzeppelin/contracts\" y \"@openzeppelin/contracts-upgradeable\". Para usuarios que no puedan actualizar; inicialice los contratos de implementaci\u00f3n usando \"UUPSUpgradeable\" al invocar la funci\u00f3n inicializadora (normalmente llamada \"initialize\"). Se proporciona un ejemplo [en el foro](https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301)"
    }
  ],
  "metrics": {
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        "source": "security-advisories@github.com",
        "type": "Primary",
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          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
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    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
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          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5
        },
        "baseSeverity": "HIGH",
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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  },
  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-665"
        }
      ]
    }
  ],
  "configurations": [
    {
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          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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  "references": [
    {
      "url": "https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301",
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Mitigation",
        "Patch",
        "Vendor Advisory"
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    },
    {
      "url": "https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592",
      "source": "security-advisories@github.com",
      "tags": [
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    {
      "url": "https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76",
      "source": "security-advisories@github.com",
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}