XSS in SharePoint: Practical Prevention Guide
SharePoint gives you a lot of ways to render user-controlled content, and that’s exactly why XSS keeps showing up in SharePoint customizations. The platform itself has decent guardrails, but the moment you add SPFx components, classic scripts, custom forms, REST-driven UI, or “just a little HTML” from a list field, you can create a mess. This guide is the practical version: where XSS shows up in SharePoint, what safe code looks like, and what I’d actually recommend in a real tenant. ...