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Fencer Vulns
critical 9.8

CVE-2022-28118 json

RCE in SiteServer CMS

published 2022-05-03 4 y ago modified 2026-07-09 4 mo ago also GHSA-q469-j32f-h7vm , EUVD-2022-4875

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

SiteServer CMS v7.x allows attackers to execute arbitrary code via a crafted plug-in.

Exploit prediction

2.77% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Richard-Tang/SSCMS-PluginShell/blob/main/Detail.md referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/siteserver/cms/issues/3386 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
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 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm siteserver
>=7.0.0
no fix listed

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.