Directory traversal vulnerability in BisonWare BisonFTP 3.5 allows remote attackers to read arbitrary files via a ../ (dot dot slash) in a RETR command.
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.