An issue was discovered in Vaultize 21.07.27. When uploading files, there is no check that the filename parameter is correct. As a result, a temporary file will be created outside the specified directory when the file is downloaded. To exploit this, an authenticated user would upload a file with an incorrect file name, and then download it.
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.