Gitlist before 0.5.0 allows remote attackers to execute arbitrary commands via shell metacharacters in the file name in the URI of a request for a (1) blame, (2) file, or (3) stats page, as demonstrated by requests to blame/master/, master/, and stats/master/.
hatriot.github.io/blog/2014/06/29/gitlist-rce/
packetstormsecurity.com/files/127281/Gitlist-0.4.0-Remote-Code-Execution.html
packetstormsecurity.com/files/127364/Gitlist-Unauthenticated-Remote-Command-Execution.html
www.exploit-db.com/exploits/33929
www.exploit-db.com/exploits/33990
groups.google.com/forum/#%21topic/gitlist/Hw_KdZfA4js