The InfiniteWP Client plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 1.13.0 via the 'historyID' parameter of the ~/debug-chart/index.php file. This makes it possible for unauthenticated attackers to read .txt files outside of the intended directory.
https://plugins.trac.wordpress.org/changeset/3202851/iwp-client/trunk/debug-chart/index.php
https://plugins.svn.wordpress.org/iwp-client/tags/1.13.0/debug-chart/index.php