Using this config to test credentials that you do not own is illegal and violates the Terms of Service of HBO Max. This falls under unauthorized access to computer systems. Risks of Downloading Unknown .svb Files

Configs can be "backdoored." When you run them, they might send your own data (like your proxy list or successful "hits") to the person who created the config.

Checking how a website's backend responds to various requests. Technical Breakdown of the Config