WireMock before 2.16.0 contains a vulnerability that allows a remote unauthenticated attacker to access local files beyond the application directory via a specially crafted XML request, aka Directory Traversal.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.