The Error Log Viewer By WP Guru plugin for WordPress is vulnerable to Arbitrary File Read in all versions up to, and including, 1.0.1.3 via the wp_ajax_nopriv_elvwp_log_download AJAX action. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information.
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.