Django 1.11.18 release notes
January 4, 2019
Django 1.11.18 fixes a security issue in 1.11.17.
CVE-2019-3498: Content spoofing possibility in the default 404 page
An attacker could craft a malicious URL that could make spoofed content appear on the default page generated by the django.views.defaults.page_not_found()
view.
The URL path is no longer displayed in the default 404 template and the request_path
context variable is now quoted to fix the issue for custom templates that use the path.