OAuth 2.0 Implicit Flow – Why It’s Deprecated and What We Learned josedacruz, July 9, 2025July 9, 2025 Welcome to another episode in our OAuth 2.0 Video Series!In this video, we deep dive into the OAuth 2.0 Implicit Flow — once popular with Single-Page Applications (SPAs), now officially deprecated. You’ll understand: Why the Implicit Flow was introduced How it works step by step The critical security vulnerabilities that led to its deprecation What to use instead: Authorization Code Flow with PKCE Whether you’re a developer, architect, or security-conscious engineer, this lesson will help you appreciate how OAuth has evolved — and why modern apps should never use the Implicit Flow again. Related security