CVE-2020-22819: MKCMS V6.2 has SQL injection via the /ucenter/active.php verify parameter.

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-22819 is a critical-severity flaw (CVSS 9.8) affecting mkcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MKCMS V6.2 has SQL injection via the /ucenter/active.php verify parameter.

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	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-89
Published	2022-11-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mkcms project

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

Am I affected?

Timeline

2022-11-03 17:15 UTCPublished CVE record published
2026-06-17 03:04 UTCUpdated Record last modified

mkcms project mkcms DOWNGRADE

Affected: 6.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.2 (Debian / Ubuntu)

apt-cache madison mkcms sudo apt install mkcms=<VERSION_BEFORE_6.2> sudo apt-mark hold mkcms

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

dnf --showduplicates list mkcms sudo dnf downgrade mkcms-<VERSION_BEFORE_6.2> sudo dnf versionlock add mkcms

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-2020-22819?

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

Is CVE-2020-22819 being exploited?

CVE-2020-22819 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-2020-22819 affect?

CVE-2020-22819 affects mkcms. Severity is critical (CVSS 9.8). MKCMS V6.2 has SQL injection via the /ucenter/active.php verify parameter.

How urgent is CVE-2020-22819?

Priority 59/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-22820 CRITICAL 9.8 DOWNGRADE MKCMS V6.2 has SQL injection via the /ucenter/repass.php name parameter.
CVE-2020-22818 CRITICAL 9.8 DOWNGRADE MKCMS V6.2 has SQL injection via /ucenter/reg.php name parameter.

References

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