PlanetMoon Guestbook tr3.a stores sensitive information under the web root with insufficient access control, which allows remote attackers to obtain the admin script password, and other passwords, via a direct request to files/passwd.txt.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11609
https://euvd.enisa.europa.eu/vulnerability/EUVD-2003-1531
http://www.securitytracker.com/id?1006360
http://www.securityfocus.com/bid/7167
http://www.securityfocus.com/archive/1/315895/30/25400/threaded