How to build a secure, role-gated portal on Webflow Cloud using Clerk and Next.js

Following the January 29, 2026 retirement of Webflow User Accounts, developers can build role-gated customer portals on Webflow Cloud using a Next.js app and Clerk for authentication, session management, and role assignment on a Webflow domain. The setup requires a Clerk account, Webflow site and CLI, Node.js 22.13.0 or later, and familiarity with the Next.js App Router, then proceeds through installing Clerk, configuring environment keys and redirect URLs, wrapping the root layout in ClerkProvider, and adding user metadata to Clerk session-token claims. Roles such as admin and client can be typed in TypeScript and verified through a reusable server-side helper, while Clerk middleware redirects unauthenticated users and limits admin routes. However, because Next.js middleware has historically been vulnerable to bypasses such as CVE-2025-29927, the guidance emphasizes independently checking authentication and roles in Server Components, Server Actions, and other data-access operations. The example portal includes client and admin dashboards, an admin user-management interface that changes Clerk metadata, Clerk-hosted sign-in and sign-up routes, deployment through the Webflow CLI, troubleshooting advice for common configuration issues, and suggestions for later connecting protected dashboards to SQLite, Supabase, Firebase, or two-factor authentication services.

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