Common Issues auth

Users Can See or Do Things They Shouldn't

Your app doesn't properly control who can see or do what. Regular users might access admin pages, see other users' private data, or perform actions (like deleting or editing) that should be restricted.

Common Causes

  • No role-based access control (RBAC) implemented
  • Access checks only on the frontend — the API allows anything
  • Row Level Security not configured (anyone can query any data)
  • Admin routes are accessible by anyone who knows the URL
  • User ID not validated on API calls — users can modify other users' data by changing the ID

How to Fix It

  1. Test by logging in as a regular user and navigating directly to admin URLs
  2. Check if API endpoints verify the user's role before performing actions
  3. If using Supabase, implement RLS policies that restrict data access by user ID
  4. Add server-side authorization checks — never rely only on hiding UI elements
  5. Verify that users can only read/update/delete their own data

Real developers can help you.

Kingsley Omage Kingsley Omage Fullstack software engineer passionate about AI Agents, blockchain, LLMs. Mehdi Ben Haddou Mehdi Ben Haddou - Founder of Chessigma (1M+ users) & many small projects - ex Founding Engineer @Uplane (YC F25) - ex Software Engineer @Amazon and @Booking.com PawelPloszaj PawelPloszaj I'm fronted developer with 10+ years of experience with big projects. I have small backend background too MFox MFox Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking. Taufan Taufan I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms. Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact. Victor Denisov Victor Denisov Developer Prakash Prajapati Prakash Prajapati I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale. Jaime Orts-Caroff Jaime Orts-Caroff I'm a Senior Android developer, open to work in various fields Matthew Butler Matthew Butler Systems Development Engineer @ Amazon Web Services Milan Surelia Milan Surelia Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems. Expertise: 💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web. 🖋️ Sharing insights through technical writing, blogging, and open-source contributions. 🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences. Notable Achievements: 🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX. 🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development. 🌟 Open source contributions on Github & StackOverflow for Flutter & Dart 🎖️ Worked on improving app performance and user experience with smart solutions. Milan is always happy to connect, work on new ideas, and explore the latest in technology.

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Frequently Asked Questions

Users can access the admin page. Is this a big deal?

Yes. If the admin page has real functionality (delete users, change settings), this is a serious security issue. Get it fixed immediately.

How do I know if my app has permission issues?

Try logging in as a regular user and manually navigating to admin URLs. Also check if you can modify another user's data by changing IDs in API requests.

Related Common Issues Issues

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