XSS in Tidio Chat Widget: Reference Guide and Fixes

Third-party chat widgets are convenient, but they also widen your XSS attack surface. Tidio is no exception. The widget itself is usually loaded from Tidio’s infrastructure, but the real risk tends to come from how developers pass data into it: visitor names, emails, custom variables, query parameters, CRM fields, and anything else that can end up rendered in the widget UI, agent panel, or related pages. If you treat Tidio integration as “just paste the script and move on,” you’re asking for trouble. ...

October 14, 2026 · 6 min · headertest.com