An issue was discovered in Mattermost Server before 3.1.0. It allows XSS because the noreferrer and noopener protection mechanisms were not in place.
{ "versions": [ { "introduced": "0" }, { "fixed": "3.1.0" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-11071.json"