CVE-2020-20298: Eval injection vulnerability in the parserCommom method in the ParserTemplate class in zzz_template.php in zzz

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-20298 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.

Eval injection vulnerability in the parserCommom method in the ParserTemplate class in zzz_template.php in zzzphp 1.7.2 allows remote attackers to execute arbitrary commands.

Why this priority

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

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-94
Published	2020-12-18
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

2020-12-18 19:15 UTCPublished CVE record published
2026-06-17 03:02 UTCUpdated Record last modified

zzzcms zzzphp DOWNGRADE

Affected: 1.7.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.7.2 (Debian / Ubuntu)

apt-cache madison zzzphp sudo apt install zzzphp=<VERSION_BEFORE_1.7.2> sudo apt-mark hold zzzphp

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

dnf --showduplicates list zzzphp sudo dnf downgrade zzzphp-<VERSION_BEFORE_1.7.2> 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.

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-2020-20298?

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

Is CVE-2020-20298 being exploited?

CVE-2020-20298 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-2020-20298 affect?

CVE-2020-20298 affects zzzphp. Severity is critical (CVSS 9.8). Eval injection vulnerability in the parserCommom method in the ParserTemplate class in zzz_template.php in zzzphp 1.7.2 allows remote attackers to execute arbitrary commands.

How urgent is CVE-2020-20298?

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

Software pages

PHP vulnerabilities

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References

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