JPX Fragment List (flst) box vulnerability in Kakadu 7.9 allows an attacker to exfiltrate local and remote files reachable by a server if the server allows the attacker to upload a specially-crafted the image that is displayed back to the attacker.
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.
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.