Injection

File Upload Vulnerabilities

File upload features are one of the most dangerous attack surfaces. Learn how attackers bypass extension checks and upload webshells to execute code on servers.

Intermediate45 min8 lessons2 hands-on

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First lesson free. The full module is part of Pro.

You'll be able to

✓Identify insecure file upload endpoints that accept dangerous file types
✓Bypass extension and MIME-type filters to upload web shells
✓Trigger uploaded script execution via the web server
✓Combine file upload with path traversal to control upload destination

Lessons

1How Hackers Took Full Control of a Hospital Network
2Why File Uploads Are Dangerous
3Bypassing Upload Filters
4Your Turn: Sneak Past the FilterHANDS-ON
5Level Up: Forge the Magic BytesHANDS-ON
6Magic Bytes and Content-Type Bypass
7SVG Upload to XSS
8Module quiz

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