a1disp.cgi program in Drummond Miles A1Stats prior to 1.6 allows a remote attacker to execute commands via a specially crafted URL which includes shell metacharacters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/6505
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0554
http://www.securityfocus.com/bid/2705
http://archives.neohapsis.com/archives/bugtraq/2001-05/0047.html