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Fencer Vulns
high 8.0

CVE-2021-3815 json

Prototype Pollution in fabiocaccamo/utils.js

published 2021-12-08 4 y ago modified 2026-06-17 4 mo ago also GHSA-3xph-cp8f-2229 , EUVD-2021-2435

cvss
8.0
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

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

Patch / fix

  • npm @fabiocaccamo/utils.js 0.17.2
  • fabiocaccamo fabiocaccamo/utils.js 0.17.2

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/20f48c63-f078-4173-bcac-a9f34885f2c0 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 8.0 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.0 8.0 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm @fabiocaccamo/utils.js
<0.17.2
0.17.2

Affected products

  • fabiocaccamo fabiocaccamo/utils.js

Classification

Weakness
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.