{"cve":"CVE-2016-11071","nvd":{"published":"2020-06-19T20:15:11.273","modified":"2026-06-17T00:40:56.490","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://mattermost.com/security-updates/","https://mattermost.com/security-updates/"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2016-11071","score":0.0069,"percentile":0.52824,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-h3qg-w9j5-wh3m","url":"https://osv.dev/vulnerability/GHSA-h3qg-w9j5-wh3m","summary":"Mattermost Server is vulnerable to XSS through lack of link relationship attributes `noreferrer` and `noopener`","modified":"2025-11-05T19:57:22.103691Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["<3.1.0"],"fixed":["3.1.0"]}]},{"id":"GO-2025-4058","url":"https://osv.dev/vulnerability/GO-2025-4058","summary":"Mattermost Server is vulnerable to XSS through lack of link relationship attributes `noreferrer` and `noopener` in github.com/mattermost/mattermost-server","modified":"2026-03-03T04:57:03.964029Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["<3.1.0+incompatible"],"fixed":["3.1.0+incompatible"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}