XSS in Telegram Bots: Where It Happens and How to Stop It
Telegram bots feel deceptively safe. A lot of developers assume the chat interface somehow neutralizes frontend risk. It doesn’t. The bot itself may only send messages, but the moment you render Telegram-controlled content inside a browser, an admin dashboard, a support console, or a Telegram Web App, you’re back in classic XSS territory. I’ve seen this pattern more than once: the bot is harmless, the backend is simple, and then someone builds a quick “internal” moderation UI that injects chat messages into innerHTML. That internal tool becomes the easiest path to account takeover. ...