Threats / Cleo / CVE-2024-50623
CVE-2024-50623
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Cleo Multiple Products vulnerability
Cleo's managed file transfer products contain an unrestricted file upload vulnerability enabling remote code execution with elevated privileges. The flaw is actively exploited in ransomware campaigns.
Verdict
Today item, not a backlog item.
An unauthenticated or low-privilege attacker can upload malicious files to execute arbitrary code with system-level permissions, facilitating data theft, encryption, and lateral movement within enterprise environments.
CISA KEV Yes · 2024-12-133Ransomware use Flagged3EPSS 0.98529 (verify live)4Exploit Weaponized · public PoC5
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
73 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-12-13), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.98529 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Cleo, Multiple Products. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-434 Unrestricted File Upload — weakness family: Path traversal / file.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I upload a crafted file bypassing validation controls to the vulnerable endpoint.
Business
Attackers gain initial code execution capability on critical file transfer infrastructure.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I execute the uploaded payload with elevated privileges to establish persistence.
Business
Ransomware operators maintain long-term access to encrypt data and exfiltrate sensitive files.
3
Lateral reach — past segmentation narrative 3
Attacker
I enumerate connected systems and credentials from the compromised file transfer node.
Business
Lateral movement spreads compromise across the enterprise, multiplying recovery costs and data exposure.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05