Summary:
Elasticsearch versions from 1.0.0 to 1.6.0 are vulnerable to a directory traversal attack that allows an attacker to retrieve files that are readable by the Elasticsearch JVM process.  

We have been assigned CVE-2015-5531 for this issue.


Fixed versions:
Versions 1.6.1 and 1.7.0 address the vulnerability.  


Remediation:
Users should upgrade to the 1.6.1 or 1.7.0 releases.  Users that do not wish to upgrade can use a firewall, reverse proxy, or Shield to prevent snapshot API calls from untrusted sources.


CVSS
Overall CVSS score: 2.6


Credits:
Benjamin Smith reported the issue.