ElasticSearch before 1.3.8 and 1.4.x before 1.4.3 allows remote attackers to bypass the sandbox protection mechanism and execute arbitrary shell commands via a crafted script to the Groovy scripting engine.
View the template here CVE-2015-1427.yaml
References:
http://www.elasticsearch.com/blog/elasticsearch-1-4-3-1-3-8-released/