Firebase Security Rules Check — Can Anyone Read or Write Your Data?
DevMeth checks the 48 known AI-code failure patterns — not a penetration test or a security guarantee.
What the issue is
Firebase Security Rules that let anyone read or write (like allow read, write) expose your realtime database or Firestore data to anyone with your project ID.
Why AI tools generate it
AI tools scaffold permissive 'allow read, write' rules to make the app work instantly, and the public-by-default posture goes uncaught until something is copied or deleted.
How DevMeth detects it
A live probe inspects your published Firebase rules and tests whether anonymous read/write is permitted, reporting the permissive qualifiers.
Your Firebase rules let anyone on the internet read or write your data
WHAT WE FOUND
database.rules.json — allow read, write: true
The fix, in three steps
Restrict rules to authenticated users and narrow to the exact paths and operations your app needs, then re-scan. Three steps.
Run a free scan and each finding carries a paste-ready fix prompt you can act on.
Try a free scanFAQ
What does 'allow read, write' on Firebase mean?
It grants anyone with your project ID full read and write access to that path — including the ability to overwrite or delete data.
Does the probe modify my Firebase data?
No. It reads the published rules and does at most a minimal read-only test, never writing.
What's a safe rule?
Auth-scoped rules that only allow each user to access their own data (e.g. using request.auth.uid), on the narrowest paths you need.
DevMeth checks the 48 known AI-code failure patterns — not a penetration test or a security guarantee. A clear result means each known pattern was checked and found clear or not applicable for your app; it is not a guarantee of security.