{"id":"CVE-2016-11071","aliases":["GHSA-h3qg-w9j5-wh3m","GO-2025-4058"],"url":"https://o3.security/vulnerability/CVE-2016-11071","summary":"Mattermost Server is vulnerable to XSS through lack of link relationship attributes `noreferrer` and `noopener`","details":"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.","published":"2020-06-19T20:15:11.273Z","modified":"2026-10-24T10:30:59.588965104Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"3.1.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2016-11071"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:59.588965104Z"}}