How severe is CVE-2024-24520?

CVE-2024-24520 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-24520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-24520?

CVE-2024-24520 affects Lepton-cms Leptoncms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-24520?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-24520 have an EU (EUVD) identifier?

Yes. CVE-2024-24520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21939.

When was CVE-2024-24520 published?

CVE-2024-24520 was published on 2024-03-21 and last updated on 2026-07-05.

CVE-2024-24520

CVE-2024-24520 is a high-severity vulnerability in Lepton-cms Leptoncms with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-21939
Weakness: CWE-94
Affected product: Lepton-cms Leptoncms
Published: 2024-03-21
Last modified: 2026-07-05

Description

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.

Frequently asked questions

What is 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 the languages place.
How severe is CVE-2024-24520?: CVE-2024-24520 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-24520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-24520?: CVE-2024-24520 affects Lepton-cms Leptoncms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-24520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-24520 have an EU (EUVD) identifier?: Yes. CVE-2024-24520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21939.
When was CVE-2024-24520 published?: CVE-2024-24520 was published on 2024-03-21 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:a:lepton-cms:leptoncms:7.0.0:*:*:*:*:*:*:*

More vulnerabilities in Lepton-cms Leptoncms

CVE-2025-56704 — High (CVSS 8.8): LeptonCMS version 7.3.0 contains an arbitrary file upload vulnerability, which is caused by the lack of proper…
CVE-2024-29514 — High (CVSS 8.8): File Upload vulnerability in lepton v.7.1.0 allows a remote authenticated attackers to execute arbitrary code via…
CVE-2024-29515 — High (CVSS 8.8): File Upload vulnerability in lepton v.7.1.0 allows a remote authenticated attackers to execute arbitrary code via…
CVE-2024-24399 — High (CVSS 7.2): An arbitrary file upload vulnerability in LEPTON v7.0.0 allows authenticated attackers to execute arbitrary PHP code by…
CVE-2020-24872 — Medium (CVSS 6.1): Cross Site Scripting (XSS) vulnerability in backend/pages/modify.php in Lepton-CMS version 4.7.0, allows remote…
CVE-2020-12705 — Medium (CVSS 6.1): Multiple cross-site scripting (XSS) vulnerabilities exist in LeptonCMS before 4.6.0.

All CVEs affecting Lepton-cms Leptoncms →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.

Browse all CWE-94 (Code Injection) vulnerabilities →