Upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts. We will update this advisory with more information soon.
A fix is included in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable.
Initialize implementation contracts using UUPSUpgradeable by invoking the initializer function (usually called initialize). An example is provided in the forum.
A post-mortem will be published in a few days in the OpenZeppelin Forum.
If you have any questions or comments about this advisory, or need assistance executing the mitigation, email us at security@openzeppelin.com.
{
"cwe_ids": [],
"github_reviewed": true,
"github_reviewed_at": "2021-09-14T22:17:40Z",
"nvd_published_at": null,
"severity": "CRITICAL"
}