This file is in a WordPress core location but is not distributed with this version of WordPress. This scan often includes files left over from a previous WordPress version, but it may also find files added by another plugin, files added by your host, or malicious files added by an attacker. <a href="https://www.wordfence.com/help/?query=scan-result-unknown-file-in-wordpress-core" target="_blank" rel="noopener noreferrer">Learn More</a>