Directory traversal vulnerability in _css/js.php in Elgg 1.5, when magic_quotes_gpc is disabled, allows remote attackers to read arbitrary files via a .. (dot dot) in the js parameter. NOTE: some of these details are obtained from third party information.
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.