falseor the WebDAV servlet is enabled with the parameter
false. This configuration would allow any unauthenticated user to upload files (as used in WebDAV). It was discovered that the filter that prevents the uploading of JavaServer Pages (.jsp) can be circumvented. So JSPs can be uploaded, which then can be executed on the server.
The issue has been reported as CVE-2017-12617
This indicates that the DefaultServlet is not used with readonly attribute.