Supabase Security Fix-It Kit

Your app talks to Supabase straight from the browser, with a key anyone can read. The only thing between that key and your users' data is Row Level Security. If it's off, or set up the way an AI "quick fix" often leaves it, strangers may be able to read or change your tables.

The Supabase Security Fix-It Kit walks non-developers through finding and fixing that, one table at a time.

What's inside

• A plain-English PDF guide (15 pages). How Supabase security actually works (roles, grants and policies, without jargon), how to read the Security Advisor, a step-by-step fix for 16 common security warnings, and how to handle publishable and secret keys, including what to do if one leaks.
• 10 copy-paste prompts for Cursor and Claude Code. Map your data, check where your keys go, explain your Security Advisor results, propose policies, clean up wide-open rules, and test it. Every prompt makes the AI show you the plan before changing anything.
• 8 commented SQL templates. Read-only checks for your project, enable RLS and set grants, owner-only policies, public read-only tables, server-only tables, fixes for views and functions that skip your rules, storage and GraphQL fixes, and a two-user test you can run in the SQL Editor.
• A pre-launch checklist covering keys, tables, views, functions, storage, auth and testing.
• A ready-made rule for your Cursor rules or CLAUDE.md, so your AI keeps your database locked from now on.

Fact-checked and tested. Everything was checked against Supabase's official documentation in October 2026, including the move to publishable and secret keys. Every SQL template was run in a real Postgres database set up like a Supabase project, with automated tests confirming that one user can't read, create, change or delete another user's rows.

Who it's for: anyone building a Supabase app with AI who isn't a database expert and wants to launch without leaving the door open.

14-day refund, no questions asked.

Questions

Do I need to know SQL? No. Every template has plain-English comments, and the prompts get your AI to adapt them to your tables and explain them before anything runs.

Will this break my app? Turning on protection can hide data until the right rule is added. The guide shows how to fix one table at a time, with a save point first, so you can always go back.

Does it work with Cursor and Claude Code? Yes. The prompts and the rule work in both.

Is this a security audit? No. It covers the most common beginner mistakes. For apps holding sensitive data, also get a professional review.

Refunds? 14 days, full refund, no questions asked.

Independent product by Vibe Shipped. Not affiliated with, endorsed by, or sponsored by Cursor (Anysphere, Inc.) or Anthropic, PBC. Product names are used only to describe compatibility.