Atlassian Bamboo before 5.11.4.1 and 5.12.x before 5.12.3.1 does not properly restrict permitted deserialized classes, which allows remote attackers to execute arbitrary code via vectors related to XStream Serialization.
https://jira.atlassian.com/browse/BAM-17736
https://confluence.atlassian.com/bamboo/bamboo-security-advisory-2016-07-20-831660461.html
http://www.securityfocus.com/bid/92057
http://www.securityfocus.com/archive/1/539003/100/0/threaded
http://packetstormsecurity.com/files/138053/Bamboo-Deserialization-Issue.html