CVE-2020-24877: A SQL injection vulnerability in zzzphp v1.8.0 through /form/index.php?module=getjson may lead to a possible a

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-24877 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.

A SQL injection vulnerability in zzzphp v1.8.0 through /form/index.php?module=getjson may lead to a possible access restriction bypass.

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	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-03-15
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

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

zzzcms zzzphp DOWNGRADE

Affected: 1.8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.8.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.8.0 (Debian / Ubuntu)

apt-cache madison zzzphp sudo apt install zzzphp=<VERSION_BEFORE_1.8.0> sudo apt-mark hold zzzphp

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

dnf --showduplicates list zzzphp sudo dnf downgrade zzzphp-<VERSION_BEFORE_1.8.0> 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.

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-2020-24877?

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

Is CVE-2020-24877 being exploited?

CVE-2020-24877 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-2020-24877 affect?

CVE-2020-24877 affects zzzphp. Severity is critical (CVSS 9.8). A SQL injection vulnerability in zzzphp v1.8.0 through /form/index.php?module=getjson may lead to a possible access restriction bypass.

How urgent is CVE-2020-24877?

Priority 65/100. 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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