Innoshop through 0.4.1 allows directory traversal via FileManager API endpoints. An authenticated attacker with access to the admin panel could abuse this to: (1) fully map the filesystem structure via the /api/file_manager/files?base_folder= endpoint, (2) create arbitrary directories on the server via the /api/file_manager/directories endpoint, (3) read arbitrary files from the server by copying the file to a readable location within the application via the /api/file_manager/copy_files endpoint, {4) delete arbitrary files from the server via a DELETE request to /api/file_manager/files, or (5) create arbitrary files on the server by uploading them and then leveraging the /api/file_manager/move_files endpoint to move them anywhere in the filesystem.
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.