CVE-2021-20089

HIGH 8.8CVE-2021-20089 · Published 23/04/2021 · updated 17/06/2026

In short

CVE-2021-20089 is a HIGH (CVSS 8.8) vulnerability affecting purl (purl project).
Chance of exploitation in the next 30 days (EPSS): 1.6%, higher than 76.0% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
purl purl_project	`= 2.3.2`	No fix yet

Description

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.

References

BlackFan/client-side-prototype-pollution · Exploit

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