CVE-2020-23630: A blind SQL injection vulnerability exists in zzcms ver201910 based on time (cookie injection).

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HIGH 8.8DOWNGRADE

CVE-2020-23630 is a high-severity flaw (CVSS 8.8) affecting zzcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A blind SQL injection vulnerability exists in zzcms ver201910 based on time (cookie injection).

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-01-11
Last modified	2026-07-09

Publisher (CNA): MITRE · Vendor: zzcms

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

Am I affected?

Timeline

2021-01-11 15:15 UTCPublished CVE record published
2026-07-09 00:16 UTCUpdated Record last modified

zzcms zzcms DOWNGRADE

Affected: 201910

Fixed in: no fixed release known

Safe to downgrade to: a release before 201910

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 201910 (Debian / Ubuntu)

apt-cache madison zzcms sudo apt install zzcms=<VERSION_BEFORE_201910> sudo apt-mark hold zzcms

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

dnf --showduplicates list zzcms sudo dnf downgrade zzcms-<VERSION_BEFORE_201910> sudo dnf versionlock add zzcms

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-2020-23630?

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

Is CVE-2020-23630 being exploited?

CVE-2020-23630 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-2020-23630 affect?

CVE-2020-23630 affects zzcms. Severity is high (CVSS 8.8). A blind SQL injection vulnerability exists in zzcms ver201910 based on time (cookie injection).

How urgent is CVE-2020-23630?

Priority 53/100. High severity; Public exploit reference

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CVE-2020-19961 HIGH 7.5 DOWNGRADE A SQL injection vulnerability has been discovered in zz cms version 2019 which allows attackers to retrieve se
CVE-2025-22957 CRITICAL 9.8 UPGRADE A SQL injection vulnerability exists in the front-end of the website in ZZCMS <= 2023, which can be exploited

References

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