CVE-2021-32605: zzzcms zzzphp before 2.0.4 allows remote attackers to execute arbitrary OS commands by placing them in the key

Q: How do I fix CVE-2021-32605?

zzzphp: upgrade to 2.0.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-32605 being exploited?

CVE-2021-32605 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-32605 affect?

CVE-2021-32605 affects zzzphp. Severity is critical (CVSS 9.8). zzzcms zzzphp before 2.0.4 allows remote attackers to execute arbitrary OS commands by placing them in the keys parameter of a ?location=search URI, as demonstrated by an OS command within an "if" "end if" block.

Q: How urgent is CVE-2021-32605?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-32605 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 before 2.0.4 allows remote attackers to execute arbitrary OS commands by placing them in the keys parameter of a ?location=search URI, as demonstrated by an OS command within an "if" "end if" block.

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	3.8% (top 10%)
CISA exploited list	No
Weakness	CWE-78
Published	2021-05-11
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

2021-05-11 23:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

zzzcms zzzphp UPGRADE

Affected: < 2.0.4

Fixed in: 2.0.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.0.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zzzphp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zzzphp

Note

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

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-2021-32605?

zzzphp: upgrade to 2.0.4. Exact commands for each OS are on this page.

Is CVE-2021-32605 being exploited?

CVE-2021-32605 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-2021-32605 affect?

CVE-2021-32605 affects zzzphp. Severity is critical (CVSS 9.8). zzzcms zzzphp before 2.0.4 allows remote attackers to execute arbitrary OS commands by placing them in the keys parameter of a ?location=search URI, as demonstrated by an OS command within an "if" "end if" block.

How urgent is CVE-2021-32605?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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