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Feature Description:
I saw bruteforcing of recent log4j exploits with dynmap's webchat feature. It's good to solve fundamental problems about this, but I think it's good to introduce a captcha feature so that anonymous users don't attack indiscriminately (or just spam botting).
(+ Still it can be blocking via cloudflare's firewall feature, but it doesn't solve that server which uses another web ports)

• Additional context: Please add any additional information you feel will help us understand the feature

• Implement Google captcha and Hcaptcha on chat
• When trying to use a webchat on webpage, show a dialog that you need to get captcha verification

Not going to happen, you are free to implement this yourself but it doesn't benefit the community at large. You can disable web chat or require login but adding captcha won't stop any bots.