# CVE-2024-50623: Cleo Multiple Products Unrestricted File Upload Vulnerability

- Exploited (CISA KEV): yes, added 2024-12-13, known ransomware use
- Published: 2024-10-27
- CVSS: 9.8 CRITICAL (v3.1)
- EPSS: 98.6% (100th percentile)
- CWE: CWE-434

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-01-21 | 86 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2025-01-21 · new · rule 200104998
  > Added: signature 200104998 "Cleo MFT Arbitrary File Read/Write" (Server Side Code Injection, risk High), systems: Java Servlets/JSP, Other Web Server. References: CVE-2024-50623.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-03-11 · new · rule 200104998
  > Added: signature 200104998 "Cleo MFT Arbitrary File Read/Write" (Server Side Code Injection, risk High), systems: Java Servlets/JSP, Other Web Server. References: CVE-2024-50623.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: partial (1 of 2 requests blocked), template CVE-2024-50623, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: partial (1 of 2 requests blocked), template CVE-2024-50623, 2026-11-02

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2024-50623 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2024-50623