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6/15/2026
Role-Based Access Control in Blazor WebAssembly with Azure AD

Role-Based Access Control in Blazor WebAssembly with Azure AD

Short summary

Blazor WebAssembly apps require two-layer authorization: client-side UI controls hide irrelevant features (cosmetic), while server-side API validation actually secures data by checking Azure AD roles (enforced). The client layer is untrusted—defense in depth demands both layers to avoid leaving your API wide open.

  • •Blazor WASM authorization splits into cosmetic (client-side UI controls) and enforced (server-side API validation) layers
  • •Configure Azure AD app roles in the portal, map them to .NET's role system, and use AuthorizeView and [Authorize] attributes
  • •Every API endpoint must independently validate roles—client-side checks alone leave you insecure

Generated with AI, which can make mistakes.

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