CVEvulnerability
CVE-2021-41264
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2021-11-12
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-665
Description
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.
Affected configurations
• openzeppelin contracts (>= 4.1.0 < 4.3.2)
Related
Weakness · CWE (1)
- CWE-665 Improper Initialization weakness
References
- https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301 Issue Tracking, Mitigation, Patch, Vendor Advisory
- https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592 Patch, Third Party Advisory
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76 Third Party Advisory
- https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301 Issue Tracking, Mitigation, Patch, Vendor Advisory
- https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592 Patch, Third Party Advisory
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76 Third Party Advisory