Why would a penetration tester need to build their own command-line XSS platform instead of using an online one?

Online XSS platforms are convenient but fail when the target system cannot access the external internet. In internal network penetration tests, you need a lightweight, cross-platform, easy-to-install XSS platform that runs locally. This article describes a Python-based command-line tool designed for such scenarios, leveraging Penetration Tool Development - Command Line Implementation of XSS Platform to create an HTTPS server and handle stolen data.