Directory traversal vulnerability in core/ViewDataTable/Factory.php in Piwik before 2.15.0 allows remote attackers to include and execute arbitrary local files via the viewDataTable 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.