What’s Vulnerable › Vulnerabilities

CVE-2021-3815: Prototype Pollution in fabiocaccamo/utils.js

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-08 · updated 2026-06-17
• Weakness: CWE-1321

Description

utils.js is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected products

• fabiocaccamo/utils.js: before 0.17.2 — fixed in 0.17.2

How to fix

Upgrade to a fixed version: fabiocaccamo/utils.js 0.17.2. Check the vendor advisory for mitigations.

References

• https://github.com/fabiocaccamo/utils.js/commit/102efafb291ce1916985514440d3bf8a6826890a
• https://huntr.dev/bounties/20f48c63-f078-4173-bcac-a9f34885f2c0
• https://github.com/fabiocaccamo/utils.js/commit/102efafb291ce1916985514440d3bf8a6826890a
• https://huntr.dev/bounties/20f48c63-f078-4173-bcac-a9f34885f2c0

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