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Vulnerability Details CVE-2022-21190

This affects the package convict before 6.2.3. This is a bypass of [CVE-2022-22143](https://security.snyk.io/vuln/SNYK-JS-CONVICT-2340604). The [fix](https://github.com/mozilla/node-convict/commit/3b86be087d8f14681a9c889d45da7fe3ad9cd880) introduced, relies on the startsWith method and does not prevent the vulnerability: before splitting the path, it checks if it starts with __proto__ or this.constructor.prototype. To bypass this check it's possible to prepend the dangerous paths with any string value followed by a dot, like for example foo.__proto__ or foo.this.constructor.prototype.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 69.6%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 7.5
References
Products affected by CVE-2022-21190


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