Melis Platform - Arbitrary File Upload (CVE-2025-10353)

CVE-2025-10353 is a critical unrestricted file upload vulnerability in the Melis Platform CMS Slider module. Attackers can upload arbitrary files through the mcsdetail_img parameter without proper validation, leading to remote code execution.

CrowdSec has been tracking this vulnerability and its exploits since 12th of March 2026.

CrowdSec network observations suggest that most exploitation of CVE-2025-10353 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. CrowdSec network telemetry also shows that exploitation of CVE-2025-10353 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.

Attackers exploit the /melis/MelisCmsSlider/MelisCmsSliderDetails/saveDetailsForm endpoint by uploading malicious files via the mcsdetail_img multipart parameter, which are then accessible at predictable paths under /media/sliders/.