CVE-2020-21881: Cross Site Request Forgery (CSRF) vulnerability in admin.php in DuxCMS 2.1 allows remote attackers to modtify

Routine

MEDIUM 6.5DOWNGRADE

CVE-2020-21881 is a medium-severity flaw (CVSS 6.5) affecting duxcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Request Forgery (CSRF) vulnerability in admin.php in DuxCMS 2.1 allows remote attackers to modtify application data via article/admin/content/add.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-352
Published	2023-07-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: duxcms project

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

Am I affected?

Timeline

2023-07-31 14:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

duxcms project duxcms DOWNGRADE

Affected: 2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1 (Debian / Ubuntu)

apt-cache madison duxcms sudo apt install duxcms=<VERSION_BEFORE_2.1> sudo apt-mark hold duxcms

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

dnf --showduplicates list duxcms sudo dnf downgrade duxcms-<VERSION_BEFORE_2.1> sudo dnf versionlock add duxcms

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-2020-21881?

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

Is CVE-2020-21881 being exploited?

CVE-2020-21881 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-2020-21881 affect?

CVE-2020-21881 affects duxcms. Severity is medium (CVSS 6.5). Cross Site Request Forgery (CSRF) vulnerability in admin.php in DuxCMS 2.1 allows remote attackers to modtify application data via article/admin/content/add.

How urgent is CVE-2020-21881?

Priority 35/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

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CVE-2020-21861 HIGH 8.8 DOWNGRADE File upload vulnerability in DuxCMS 2.1 allows attackers to execute arbitrary php code via duxcms/AdminUpload/

References

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