CVE-2021-41264: OpenZeppelin Contracts is a library for smart contract development. In affected versions upgradeable contracts using `UUPSUpgradeable` may be vulnerable to an…

PriorityP349critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

1.44%

70.2th percentile

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).

Affected

4 ranges

Vendor	Product	Version range	Fixed in
openzeppelin	contracts	>= 4.1.0 < 4.3.2	4.3.2
openzeppelin	contracts	>= 4.1.0 < 4.3.2	4.3.2
openzeppelin	contracts-upgradeable	>= 4.1.0 < 4.3.2	4.3.2
openzeppelin	openzeppelin-contracts	—	—

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

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