Pallets Werkzeug before 0.15.5 is susceptible to local file inclusion because SharedDataMiddleware mishandles drive names (such as C:) in Windows pathnames.
View the template here CVE-2019-14322.yaml
References:
http://packetstormsecurity.com/files/163398/Pallets-Werkzeug-0.15.4-Path-Traversal.html