CVE-2022-28118: SiteServer CMS v7.x allows attackers to execute arbitrary code via a crafted plug-in.

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2022-28118 is a critical-severity flaw (CVSS 9.8) affecting siteserver cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Published	2022-05-03
Last modified	2026-07-09

Publisher (CNA): MITRE · Vendor: sscms

Last updated 2026-07-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-05-03 01:15 UTCPublished CVE record published
2026-07-09 01:17 UTCUpdated Record last modified

sscms siteserver cms UPGRADE

Affected: >= 7.0.0 and <= 7.1.2

Fixed in: newer than 7.1.2

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy siteserver-cms || rpm -q siteserver-cms || siteserver-cms --version

2. UPGRADE to newer than 7.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade siteserver-cms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade siteserver-cms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison siteserver-cms sudo apt install siteserver-cms=<VERSION_BEFORE_7.0.0> sudo apt-mark hold siteserver-cms

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list siteserver-cms sudo dnf downgrade siteserver-cms-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add siteserver-cms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-28118?

siteserver cms: upgrade to newer than 7.1.2. Exact commands for each OS are on this page.

Is CVE-2022-28118 being exploited?

CVE-2022-28118 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-28118 affect?

CVE-2022-28118 affects siteserver cms. Severity is critical (CVSS 9.8). SiteServer CMS v7.x allows attackers to execute arbitrary code via a crafted plug-in.

How urgent is CVE-2022-28118?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-45529 HIGH 7.1 DOWNGRADE An arbitrary file read vulnerability in the ReadTextAsynchronous function of SSCMS v7.3.1 allows attackers to
CVE-2023-2862 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, was found in SiteServer CMS up to 7.2.1
CVE-2022-44299 MEDIUM 4.9 DOWNGRADE SiteServerCMS 7.1.3 sscms has a file read vulnerability.
CVE-2022-44298 CRITICAL 9.8 DOWNGRADE SiteServer CMS 7.1.3 is vulnerable to SQL Injection.
CVE-2022-44297 CRITICAL 9.8 DOWNGRADE SiteServer CMS 7.1.3 has a SQL injection vulnerability the background.

References

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