lib/rrd.php in Cacti 0.8.7g, 0.8.8b, and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in unspecified parameters.
https://security.gentoo.org/glsa/201509-03
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=742768
http://www.securityfocus.com/bid/66630
http://www.debian.org/security/2014/dsa-2970
http://svn.cacti.net/viewvc?view=rev&revision=7439
http://secunia.com/advisories/59203
http://secunia.com/advisories/57647
http://seclists.org/oss-sec/2014/q2/15
http://lists.fedoraproject.org/pipermail/package-announce/2014-April/131842.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-April/131821.html