Why can't I query PostgreSQL database tables in Sophos XG, and how do I resolve it?

PostgreSQL runs with low-privilege user permissions, preventing direct table queries. To gain full access, you need to escalate privileges by modifying the database connection settings or using the existing credentials found in the decrypted cscconf.bin configuration file. Once you have the database password, you can connect as a superuser and execute queries. This is a common challenge in firewall appliance debugging; similar issues arise in Setting up GoAnywhere Managed File Transfer Vulnerability Debugging Environment.