Never trust a client-side ID or role. Re-verify the user's permissions on the server for every sensitive action.
Gruyere uses a database to store user preferences and snippets. gruyere learn web application exploits defenses top
Object handling Exploit: Attacker crafts a malicious serialized object that executes arbitrary code upon deserialization (e.g., Java, PHP, Python pickle). Never trust a client-side ID or role
Even if one defense fails (e.g., WAF missed SQLi), parameterized query stops it. If developer forgot encoding, CSP still blocks script execution. That’s the Gruyère advantage. WAF missed SQLi)