Prototype Pollution in Purl Project
CVE-2021-20089
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.
Vulnerability class: Prototype Pollution
EPSS: 0.016 (73.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Purl_project Purl — versions 2.3.2
- N/a Purl — versions 2.3.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vulnreport@tenable.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-20089?
- CVE-2021-20089 is a high-severity vulnerability in Purl Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 8.8/10. Published 2021-04-23.
- How severe is CVE-2021-20089?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-20089 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.