PortSwigger Web Security Academy
Free web security training with labs and learning paths.
Open resourceMAG212CYBER Learn
Start with legal, hands-on platforms and community resources for web security, Linux, CTFs, and vulnerability awareness.
OWASP WebGoat
Deliberately insecure app for learning common web vulnerabilities safely.
Open resourceOverTheWire
Wargames that teach Linux, web security, and exploitation basics.
Open resourcepicoCTF
Free cybersecurity education with CTF-style challenges from Carnegie Mellon.
Open resourceTryHackMe
Guided hands-on labs with a generous free tier for core skills.
Open resourceHack The Box Academy
Structured academy modules and labs with free starter content.
Open resourceOWASP Projects
Community-led open source security projects, guides, and testing resources.
Open resourceCISA Known Exploited Vulnerabilities
Official catalog of actively exploited vulnerabilities for defenders.
Open resource