CVE-2020-21252: Cross Site Request Forgery vulnerability in Neeke HongCMS 3.0.0 allows a remote attacker to execute arbitrary

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HIGH 8.8DOWNGRADE

CVE-2020-21252 is a high-severity flaw (CVSS 8.8) affecting hongcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Request Forgery vulnerability in Neeke HongCMS 3.0.0 allows a remote attacker to execute arbitrary code and escalate privileges via the updateusers parameter.

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	None
User interaction	Required
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-352
Published	2023-06-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: hongcms project

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

Am I affected?

Timeline

2023-06-20 15:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

hongcms project hongcms DOWNGRADE

Affected: 3.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison hongcms sudo apt install hongcms=<VERSION_BEFORE_3.0.0> sudo apt-mark hold hongcms

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

dnf --showduplicates list hongcms sudo dnf downgrade hongcms-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add hongcms

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-2020-21252?

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

Is CVE-2020-21252 being exploited?

CVE-2020-21252 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-2020-21252 affect?

CVE-2020-21252 affects hongcms. Severity is high (CVSS 8.8). Cross Site Request Forgery vulnerability in Neeke HongCMS 3.0.0 allows a remote attacker to execute arbitrary code and escalate privileges via the updateusers parameter.

How urgent is CVE-2020-21252?

Priority 45/100. High severity; Public exploit reference

Related CVEs

CVE-2022-32412 HIGH 7.2 DOWNGRADE An issue in the /template/edit component of HongCMS v3.0 allows attackers to getshell.
CVE-2022-32411 HIGH 7.2 DOWNGRADE An issue in the languages config file of HongCMS v3.0 allows attackers to getshell.
CVE-2020-21643 MEDIUM 6.1 DOWNGRADE Cross Site Scripting (XSS) vulnerability in HongCMS 3.0 allows attackers to run arbitrary code via the callbac

References

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