Directory traversal vulnerability in index.php in phpSysInfo 2.5.1 allows remote attackers to determine the existence of arbitrary files via a .. (dot dot) sequence and a trailing null (%00) byte in the lng parameter, which will display a different error message if the file exists.
Improper Limitation of a Pathname to a Restricted Directory 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.