CVE-2021-22856: The CGE property management system contains SQL Injection vulnerabilities

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-22856 is a critical-severity flaw (CVSS 9.8) affecting changjia property management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The CGE property management system contains SQL Injection vulnerabilities. Remote attackers can inject SQL commands into the parameters in Cookie and obtain data in the database without privilege.

Why this priority

Critical severity
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	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-02-17
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: changjia property management system project

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

Am I affected?

Timeline

2021-02-17 11:15 UTCPublished CVE record published
2026-06-17 03:37 UTCUpdated Record last modified

changjia property management system project changjia property management system DOWNGRADE

Affected: 1.00

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.00

1. Check installed version

apt-cache policy changjia-property-management-system || rpm -q changjia-property-management-system || changjia-property-management-system --version

2. No fixed release: DOWNGRADE to a release before 1.00 (Debian / Ubuntu)

apt-cache madison changjia-property-management-system sudo apt install changjia-property-management-system=<VERSION_BEFORE_1.00> sudo apt-mark hold changjia-property-management-system

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

dnf --showduplicates list changjia-property-management-system sudo dnf downgrade changjia-property-management-system-<VERSION_BEFORE_1.00> sudo dnf versionlock add changjia-property-management-system

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-2021-22856?

changjia property management system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-22856 being exploited?

CVE-2021-22856 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-2021-22856 affect?

CVE-2021-22856 affects changjia property management system. Severity is critical (CVSS 9.8). The CGE property management system contains SQL Injection vulnerabilities. Remote attackers can inject SQL commands into the parameters in Cookie and obtain data in the database without privilege.

How urgent is CVE-2021-22856?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-22858 HIGH 8.8 DOWNGRADE Attackers can access the CGE account management function without privilege for permission elevation and execut
CVE-2021-22857 HIGH 7.5 DOWNGRADE The CGE page with download function contains a Directory Traversal vulnerability

References

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