CVE-2022-23881: ZZZCMS zzzphp v2.1.0 was discovered to contain a remote command execution (RCE) vulnerability via danger_key()

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-23881 is a critical-severity flaw (CVSS 9.8) affecting zzzphp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZZZCMS zzzphp v2.1.0 was discovered to contain a remote command execution (RCE) vulnerability via danger_key() at zzz_template.php.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
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	56.5% (top 1%)
CISA exploited list	No
Published	2022-03-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zzzcms

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-23 21:15 UTCPublished CVE record published
2026-06-17 04:30 UTCUpdated Record last modified

zzzcms zzzphp DOWNGRADE

Affected: 2.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.0

1. Check installed version

apt-cache policy zzzphp || rpm -q zzzphp || zzzphp --version

2. No fixed release: DOWNGRADE to a release before 2.1.0 (Debian / Ubuntu)

apt-cache madison zzzphp sudo apt install zzzphp=<VERSION_BEFORE_2.1.0> sudo apt-mark hold zzzphp

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list zzzphp sudo dnf downgrade zzzphp-<VERSION_BEFORE_2.1.0> sudo dnf versionlock add zzzphp

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · nodejs-pnpm12 · FIXED · 12.17.0-1.fc46 · FEDORA-2026-7adfb2bcdd · source

sudo dnf upgrade --advisory=FEDORA-2026-7adfb2bcdd

Fedora ELN · wget2 · FIXED · 2.3.0-3.eln159 · FEDORA-2026-811b4922a5 · source

sudo dnf upgrade --advisory=FEDORA-2026-811b4922a5

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/metaStor/Vuls/blob/main/zzzcms/zzzphp%20V2.1.0%20RCE/zzzphp%20V2.1.0%20RCE.md
Nuclei scan template: ZZZCMS zzzphp 2.1.0 - Remote Code Execution

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-2022-23881?

zzzphp: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-23881 being exploited?

CVE-2022-23881 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-2022-23881 affect?

CVE-2022-23881 affects zzzphp. Severity is critical (CVSS 9.8). ZZZCMS zzzphp v2.1.0 was discovered to contain a remote command execution (RCE) vulnerability via danger_key() at zzz_template.php.

How urgent is CVE-2022-23881?

Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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