CVE-2023-53980: ProjectSend

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious files by manipulating file extensions. Attackers can upload shell scripts with disguised extensions through the upload.process.php endpoint to execute arbitrary commands on the server.

Affected products

Published 2025-12-22. Last modified 2026-06-17.