🚨 Critical Vulnerability in File Upload Systems

If proper validation is not implemented during file uploads, an attacker may upload a web shell, gain full control of the server, and create a backdoor 😐

How does it happen?

▪️ Uploading an executable file such as `.php`
▪️ Using double extensions like `image.jpg.php`
▪️ Manipulating the MIME type

How to secure your application?

✅ Use a whitelist of allowed file extensions only
✅ Validate the MIME type on the server side
✅ Rename uploaded files to random names
✅ Store files outside the execution directory
✅ Disable script execution inside the uploads folder
✅ Enable a WAF (Web Application Firewall) or additional security checks

⚠️ Never rely on file extensions alone… validation must always be done on the server side.

#CyberSecurity
#WebSecurity
#OWASP
#SecureCoding
#FileUpload