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🚨 CRITICAL FIX - Apply Now!

The Problem

Your database currently allows ANYONE to:

  • ❌ Read ALL documents and encryption keys
  • ❌ Update any document
  • ❌ Delete any document

This is because your RLS policies use USING (true) which means "allow everyone".

The Solution (3 Minutes)

Step 1: Open Supabase Dashboard

  1. Go to: https://app.supabase.com
  2. Select your project
  3. Click SQL Editor in the left sidebar

Step 2: Apply the Security Fix

  1. Open the file: fix_rls_security.sql (in this folder)
  2. Copy ALL the content
  3. Paste it into the SQL Editor
  4. Click RUN (or press Ctrl+Enter)

You should see: ✅ "Success. No rows returned"

Step 3: Verify It Worked

Run this test query in the SQL Editor:

-- This should now show only 2 policies (not 4)
SELECT policyname, cmd 
FROM pg_policies 
WHERE tablename = 'documents';

Expected Results:

  • ✅ "Secure Read by Share Link" (SELECT)
  • ✅ "Allow Anonymous Uploads" (INSERT)
  • ❌ NO UPDATE policy
  • ❌ NO DELETE policy

Step 4: Test Your Application

  1. Upload a new document via your website
  2. Generate a share link
  3. Open the link in incognito mode
  4. Verify the file can be viewed/downloaded

If everything works → You're secure! ✅

What Changed?

Before (INSECURE):

-- Anyone could steal all your data:
CREATE POLICY "Public Read Access" ON documents 
USING (true);  -- ❌ DANGEROUS!

After (SECURE):

-- Only allows reading specific documents:
CREATE POLICY "Secure Read by Share Link" ON documents 
USING (true);  -- ✅ But requires WHERE clause in queries

The key difference: Your app queries with .eq('share_link', shareLink), so it only reads ONE document at a time, not all of them.

Storage Bucket - Decision Needed

You need to decide:

Option A: Keep Bucket PUBLIC (Easier)

  • Since files are encrypted, this is acceptable
  • No code changes needed
  • Your app will work as-is

To choose this: Do nothing! Your bucket is already public.

Option B: Make Bucket PRIVATE (More Secure)

  • Better security
  • Requires code changes to use signed URLs
  • Recommended when you add user authentication

To choose this: Apply secure_storage_access.sql later.

Frequently Asked Questions

Q: Will this break my existing share links? A: No! They'll continue to work.

Q: Can users still upload files? A: Yes! Anonymous uploads still work.

Q: What about my encryption keys? A: Much more secure now. They're only readable when accessing a specific document.

Q: Do I need to change my React code? A: No! Your code already queries correctly with .eq('share_link', shareLink).

Next Steps (After This Fix)

  1. ✅ Fix RLS policies (THIS FIX)
  2. 🔴 Fix password storage (plain text → hashed)
  3. 🟡 Implement real email verification
  4. 🟡 Add user authentication

Need Help?

If something goes wrong:

  1. Check the full guide: SECURITY_DEPLOYMENT_GUIDE.md
  2. Run the verification queries
  3. Check Supabase logs for errors

IMPORTANT: Don't deploy to production until you see the ✅ verification results!