file-handling-uploads

What problem does it solve?

This Skill addresses the security risks involved in handling file uploads, such as malicious files, unsafe content, and improper storage, protecting applications from exploitation.

Core Features & Use Cases

• Implement Multi-layered Validation: Enforce extension allow-lists, MIME type checks, and file signature verification to prevent dangerous uploads.
• Secure Storage and Access Control: Store files outside web roots with proper permissions and restrict user access based on authentication.
• Use Case: When users upload images or documents, the Skill ensures only safe files are accepted, validated, and stored securely without risking server compromise.

Quick Start

Apply this Skill to check uploaded files' extensions, validate their content signatures, and enforce secure storage practices in your web application.