Hitachi Vantara Pentaho Business Analytics Server versions before 9.4.0.0 and 9.3.0.1, including 8.3.x, using the Pentaho Data Access plugin exposes a service endpoint for CSV import which allows a user supplied path to access resources that are out of bounds.
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.