Vulnerability Details CVE-2021-41264
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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 69.4%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 7.5
References
- https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301
- https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76
- https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301
- https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76
Products affected by CVE-2021-41264
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cpe:2.3:a:openzeppelin:contracts:4.1.0
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cpe:2.3:a:openzeppelin:contracts:4.2.0
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cpe:2.3:a:openzeppelin:contracts:4.3.0
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cpe:2.3:a:openzeppelin:contracts:4.3.1