Common Security Risks in File Upload and Sharing Platforms

Common security risks in file upload and sharing platforms stem from unrestricted file intake and uncontrolled delivery. Intake risks include malware injection, active content execution (e.g., malicious scripts in SVG/HTML), and denial-of-service via resource exhaustion. Sharing risks include broken access control, permanent or guessable links, and data leakage via unstripped EXIF metadata.