CVE-2024-24520: An issue in Lepton CMS v.7.0.0 allows a local attacker to execute arbitrary code via the upgrade.php file in t

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HIGH 7.8DOWNGRADE

CVE-2024-24520 is a high-severity flaw (CVSS 7.8) affecting leptoncms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in Lepton CMS v.7.0.0 allows a local attacker to execute arbitrary code via the upgrade.php file in the languages place.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-94
Published	2024-03-21
Last modified	2026-07-09

Publisher (CNA): MITRE · Vendor: lepton-cms

Last updated 2026-07-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-03-21 02:52 UTCPublished CVE record published
2026-07-09 01:18 UTCUpdated Record last modified

lepton-cms leptoncms DOWNGRADE

Affected: 7.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison leptoncms sudo apt install leptoncms=<VERSION_BEFORE_7.0.0> sudo apt-mark hold leptoncms

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

dnf --showduplicates list leptoncms sudo dnf downgrade leptoncms-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add leptoncms

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-2024-24520?

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

Is CVE-2024-24520 being exploited?

CVE-2024-24520 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-2024-24520 affect?

CVE-2024-24520 affects leptoncms. Severity is high (CVSS 7.8). An issue in Lepton CMS v.7.0.0 allows a local attacker to execute arbitrary code via the upgrade.php file in the languages place.

How urgent is CVE-2024-24520?

Priority 41/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

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References

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