The EUCookieLaw plugin for WordPress is vulnerable to Arbitrary File Read in all versions up to, and including, 2.7.2 via the 'file_get_contents' function. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information. The vulnerability can only be exploited if a caching plugin such as W3 Total Cache is installed and activated.
https://plugins.trac.wordpress.org/changeset/3288917/
https://plugins.trac.wordpress.org/browser/eucookielaw/trunk/templates/EUCookieCache.php#L26