How to protect Laravel website from APP_KEY Session Forgery Attack

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The APP_KEY Session Forgery Attack Laravel uses APP_KEY to encrypt and sign all session cookies.
If an attacker knows your APP_KEY, they can: Decrypt their own session cookie (as a regular user or even without an account) Modify the session data (e.g., change user ID to an admin's ID, or set admin flags) Re-encrypt it with the same known key Send the forged cookie → instant admin access, no password needed This explains perfectly why: Multiple buyers are hit (same key across installations) The wallet change goes through the normal controller (updated_at updates — it's a real logged-in admin session) No backdoor was found What to do RIGHT NOW

Step 1 — Regenerate your APP_KEY immediately: This invalidates ALL existing sessions, including any the attacker has forged.

Step 2 — Tell ALL your buyers to regenerate their key too. This is urgent.

Step 3 — Add key:generate to your installation instructions so every new install gets a unique key. The .env.example correctly has APP_KEY= blank, but buyers probably copied your actual .env or used a preconfigured one.

Step 4 — Check how you distribute the script. If your ZIP/package includes a .env file (not just .env.example) with the APP_KEY already set, remove it or blank out the key.

Only ship .env.example. The good news: this is fixable. Once each buyer runs php artisan key:generate, the attacker loses access on that installation immediately because all their forged session cookies become invalid

Видео How to protect Laravel website from APP_KEY Session Forgery Attack канала Remedy Dev Tech