Directory traversal vulnerability in install/help.php in TalkBack 2.3.5, and other versions before 2.3.6.2, allows remote attackers to include and execute arbitrary local files via directory traversal sequences in the language parameter.
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.