Information disclosed from this page can be used to gain additional information about the target system.
One of the main features of debug mode is the display of detailed error pages. If your app raises an exception when DEBUG is True, Django will display a detailed traceback, including a lot of metadata about your environment, such as all the currently defined Django settings (from settings.py). If an attacker can successfully start a remote debugging session, this is likely to disclose sensitive information about the web application and supporting infrastructure that may be valuable in formulating targeted attacks against the system.
Never deploy a site into production with DEBUG turned on. To disable debug mode, set DEBUG = False in your Django settings file.