Vulnerability Details CVE-2021-39168
OpenZepplin is a library for smart contract development. In affected versions a vulnerability in TimelockController allowed an actor with the executor role to escalate privileges. Further details about the vulnerability will be disclosed at a later date. As a workaround revoke the executor role from accounts not strictly under the team's control. We recommend revoking all executors that are not also proposers. When applying this mitigation, ensure there is at least one proposer and executor remaining.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 62.2%
CVSS Severity
CVSS v3 Score 10.0
CVSS v2 Score 7.5
References
- https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/security/advisories/GHSA-vrw4-w73r-6mm8
- https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md#431
- https://github.com/OpenZeppelin/openzeppelin-contracts/commit/cec4f2ef57495d8b1742d62846da212515d99dd5
- https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/security/advisories/GHSA-vrw4-w73r-6mm8
- https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md#431
- https://github.com/OpenZeppelin/openzeppelin-contracts/commit/cec4f2ef57495d8b1742d62846da212515d99dd5
Products affected by CVE-2021-39168
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cpe:2.3:a:openzeppelin:contracts:3.3.0
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cpe:2.3:a:openzeppelin:contracts:3.4.0
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cpe:2.3:a:openzeppelin:contracts:3.4.1
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cpe:2.3:a:openzeppelin:contracts:4.0.0
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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