Arbitrary file upload in Cleo Harmony

CVE-2024-50623

In Cleo Harmony before 5.8.0.21, VLTrader before 5.8.0.21, and LexiCom before 5.8.0.21, there is an unrestricted file upload and download that could lead to remote code execution.

Vulnerability class: Unrestricted File Upload

EPSS: 0.985 (99.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2024-50623?
CVE-2024-50623 is a critical-severity vulnerability in Cleo Harmony, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2024-10-28.
How severe is CVE-2024-50623?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2024-50623 known to be exploited?
Yes. CVE-2024-50623 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-12-13), indicating it is being actively exploited. 14 public proof-of-concept repositories are indexed.