Directory traversal vulnerability in the eXtplorer module (com_extplorer) 2.0.0 RC2 and earlier in Joomla! allows remote attackers to read arbitrary files via a .. (dot dot) in the dir parameter in a show_error action.
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.