The remote Debian host is missing a security update.
It was discovered that there was a content-spoofing vulnerability in the default 404 pages in the Django web development framework. For more information, please see : https://www.djangoproject.com/weblog/2019/jan/04/security-releases/ For Debian 8 'Jessie', this issue has been fixed in python-django version 1.7.11-1+deb8u4. We recommend that you upgrade your python-django packages. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.