CVE-2024-12666: A vulnerability has been found in ClassCMS up to 4.8 and classified as critical

Q: How do I fix CVE-2024-12666?

classcms: upgrade to newer than 4.8. Exact commands for each OS are on this page.

Q: Is CVE-2024-12666 being exploited?

CVE-2024-12666 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-12666 affect?

CVE-2024-12666 affects classcms. Severity is medium (CVSS 4.7). A vulnerability has been found in ClassCMS up to 4.8 and classified as critical. Affected by this vulnerability is an unknown functionality of the file /admin?do=admin:user:editPost of the component User Management Page. The manipulation le

Q: How urgent is CVE-2024-12666?

Priority 33/100. Public exploit reference

Routine

MEDIUM 4.7UPGRADE

CVE-2024-12666 is a medium-severity flaw (CVSS 4.7) affecting classcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in ClassCMS up to 4.8 and classified as critical. Affected by this vulnerability is an unknown functionality of the file /admin?do=admin:user:editPost of the component User Management Page. The manipulation leads to improper handling of insufficient privileges. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-266, CWE-274
Published	2024-12-16
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: classcms

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

Am I affected?

Timeline

2024-12-16 20:15 UTCPublished CVE record published
2026-06-17 07:00 UTCUpdated Record last modified

classcms classcms UPGRADE

Affected: <= 4.8

Fixed in: newer than 4.8

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade classcms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade classcms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2024-12666?

classcms: upgrade to newer than 4.8. Exact commands for each OS are on this page.

Is CVE-2024-12666 being exploited?

CVE-2024-12666 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-2024-12666 affect?

CVE-2024-12666 affects classcms. Severity is medium (CVSS 4.7). A vulnerability has been found in ClassCMS up to 4.8 and classified as critical. Affected by this vulnerability is an unknown functionality of the file /admin?do=admin:user:editPost of the component User Management Page. The manipulation le

How urgent is CVE-2024-12666?

Priority 33/100. Public exploit reference

Related CVEs

CVE-2024-8145 LOW 2.4 DOWNGRADE A vulnerability, which was classified as problematic, has been found in ClassCMS 4.8
CVE-2024-8144 LOW 3.5 DOWNGRADE A vulnerability classified as problematic was found in ClassCMS 4.8
CVE-2024-6932 LOW 3.5 DOWNGRADE A vulnerability was found in ClassCMS 4.5
CVE-2024-57099 CRITICAL 9.8 DOWNGRADE ClassCMS v4.8 has a code execution vulnerability
CVE-2024-57097 MEDIUM 4.8 DOWNGRADE ClassCMS 4.8 is vulnerable to Cross Site Scripting (XSS) in class/admin/channel.php.

References

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