- Hacker101 | Good Exercises for Beginners, can earn you private Invites on HackerOne
- Pentesterlab | Good Labs with a broad variety of Topics, some very good Web Application Exercises
- HackTheBox | provides Testing Labs, some Web Application Challenges
- XSS-Game | Learning Platform for XSS
- HackEdu
- DWVA
- Google Gruyere
- Web Security Academy by PortSwigger
- XSS Labs from PwnFunction Great Labs in a beautiful layout
- 0l4bs - Cross-site scripting labs for web application security enthusiasts - by tegal1337
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