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Fencer Vulns
high 7.3

CVE-2020-7778 json

Prototype Pollution

published 2020-11-26 5 y ago modified 2026-09-10 1 mo ago also GHSA-8j36-q8x7-pm6q , EUVD-2022-0919

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

This affects the package systeminformation before 4.30.2. The attacker can overwrite the properties and functions of an object, which can lead to executing OS commands.

Patch / fix

  • npm systeminformation 4.30.2
  • n/a systeminformation 4.30.2

Exploit prediction

2.42% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/sebhildebrandt/systeminformation/blob/master/lib/internet.js referenced PoC, tagged "exploit" by a source, unverified
  • gist.github.com https://gist.github.com/EffectRenan/b434438938eed0b21b376cedf5c81e80 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
npm systeminformation
<4.30.2
4.30.2

Affected products

  • n/a systeminformation

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

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.