Cleo - RCE (CVE-2024-50623)

CVE-2024-50623 is a critical vulnerability in Cleo Harmony, VLTrader, and LexiCom that allows for unrestricted file upload and download, potentially resulting in remote code execution.

CrowdSec has been tracking this vulnerability and its exploits since 10th of March 2025.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2024-50623 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. CrowdSec network telemetry also shows that exploitation of CVE-2024-50623 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Observed attack attempts are primarily focused on the /synchronization endpoint.