blog.cgi in Leif M. Wright Web Blog 1.1 and 1.1.5 allows remote attackers to execute arbitrary commands via shell metacharacters such as '|' in the file parameter of ViewFile requests.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15019
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-2339
http://www.securityfocus.com/bid/9539
http://www.securityfocus.com/archive/1/352303