On this web server, a file containing SFTP/FTP connection credentials was discovered.
Some SFTP/FTP clients save SFTP/FTP connection information in text files, such as hostname, username, and password. Sublime SFTP, for example, creates a file called sftp-config.json, while FileZilla saves the information in a file called recentservers.xml.
Restrict access to this file or remove it from the webserver.