Absolute path traversal vulnerability in pkg_edit.php in pfSense before 2.1.4 allows remote attackers to read arbitrary XML files via a full pathname in the xml parameter.
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.