Ultimate PHP Board (UPB) 1.0 allows remote attackers to view the physical path of the message board via a direct request to add.php, which leaks the path in an error message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10788
https://euvd.enisa.europa.eu/vulnerability/EUVD-2002-2254
http://www.securityfocus.com/bid/6333
http://archives.neohapsis.com/archives/bugtraq/2002-12/0071.html