Vulnerability Details CVE-2021-46320
In OpenZeppelin <=v4.4.0, initializer functions that are invoked separate from contract creation (the most prominent example being minimal proxies) may be reentered if they make an untrusted non-view external call. Once an initializer has finished running it can never be re-executed. However, an exception put in place to support multiple inheritance made reentrancy possible, breaking the expectation that there is a single execution.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 64.6%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
Products affected by CVE-2021-46320
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cpe:2.3:a:openzeppelin:openzeppelin:*