A flaw was found in PackStack. This vulnerability allows a local user to modify deployed systems by changing the answer file, which is created in insecure directories such as /tmp or the current working directory. This insecure file creation could lead to unauthorized system modifications.
https://exchange.xforce.ibmcloud.com/vulnerabilities/83017
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-1834
https://bugzilla.redhat.com/show_bug.cgi?id=917904