https://xss-game.appspot.com/ https://xss-game.appspot.com/ (this has a lot of overlap with gruyere) https://github.com/cure53/XSSChallengeWiki/wiki https://gi

https://xss-game.appspot.com/ https://xss-game.appspot.com/ (this has a lot of overlap with gruyere) https://github.com/cure53/XSSChallengeWiki/wiki https://github.com/cure53/XSSChallengeWiki/wiki https://sites.google.com/site/infosecrocks/ https://sites.google.com/site/infosecrocks/ (this links to some of the other stuff I mentioned) https://www.hacking-lab.com https://www.hacking-lab.com There's also these 2 advanced XSS challenges: https://alf.nu/alert1 https://alf.nu/alert1 https://prompt.ml/0 https://prompt.ml/0 I'm not sure if they're still functional, I think some of their solutions require functionality that browsers have since changed. You might also want to check out the Youtube channel Live Overflow: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w