CVE-2024-8866: A vulnerability was found in AutoCMS 5.4

Routine

MEDIUM 4.3DOWNGRADE

CVE-2024-8866 is a medium-severity flaw (CVSS 4.3) affecting autocms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in AutoCMS 5.4. It has been classified as problematic. This affects an unknown part of the file /admin/robot.php. The manipulation of the argument sidebar leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-09-15
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: autocms project

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

Am I affected?

Timeline

2024-09-15 02:15 UTCPublished CVE record published
2026-06-17 08:23 UTCUpdated Record last modified

autocms project autocms DOWNGRADE

Affected: 5.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.4 (Debian / Ubuntu)

apt-cache madison autocms sudo apt install autocms=<VERSION_BEFORE_5.4> sudo apt-mark hold autocms

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

dnf --showduplicates list autocms sudo dnf downgrade autocms-<VERSION_BEFORE_5.4> sudo dnf versionlock add autocms

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-2024-8866?

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

Is CVE-2024-8866 being exploited?

CVE-2024-8866 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-2024-8866 affect?

CVE-2024-8866 affects autocms. Severity is medium (CVSS 4.3). A vulnerability was found in AutoCMS 5.4. It has been classified as problematic. This affects an unknown part of the file /admin/robot.php. The manipulation of the argument sidebar leads to cross site scripting. It is possible to initiate t

How urgent is CVE-2024-8866?

Priority 33/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-44725 HIGH 7.2 DOWNGRADE AutoCMS v5.4 was discovered to contain a SQL injection vulnerability via the sidebar parameter at /admin/robot
CVE-2024-44724 HIGH 7.2 DOWNGRADE AutoCMS v5.4 was discovered to contain a PHP code injection vulnerability via the txtsite_url parameter at /ad

References

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