xymond/xymond.c in xymond in Xymon 4.1.x, 4.2.x, and 4.3.x before 4.3.25 allow remote attackers to read arbitrary files in the configuration directory via a "config" command.
https://sourceforge.net/p/xymon/code/7890/
http://www.securityfocus.com/archive/1/537522/100/0/threaded