Directory traversal vulnerability in pimcore before build 3473 allows remote authenticated users with the "assets" permission to create or write to arbitrary files via a .. (dot dot) in the dir parameter to admin/asset/add-asset-compatibility.
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.