{"action":"Upgrade github.com/mattermost/mattermost-server to 4.1.2+incompatible or later.","affected":[{"fixed":"4.1.2+incompatible","introduced":"0"},{"fixed":"4.2.1+incompatible","introduced":"4.2.0-rc1+incompatible"},{"fixed":"4.3.0+incompatible","introduced":"4.3.0-rc1+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2017-18887"],"ecosystem":"Go","epss":0.00927,"exploited":false,"fixed_versions":["4.1.2+incompatible","4.2.1+incompatible","4.3.0+incompatible"],"ghsa_id":"GHSA-35c4-5qfp-wxj6","id":"tcs_01M5KGC7CM9H223H1BKW1DHZGJ","modified_at":"2026-03-03T04:57:45.950639Z","published_at":"2025-12-15T19:37:35Z","references":["https://osv.dev/vulnerability/GO-2025-4199","https://github.com/advisories/GHSA-35c4-5qfp-wxj6","https://nvd.nist.gov/vuln/detail/CVE-2017-18887","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GO-2025-4199","url":"https://osv.dev/vulnerability/GO-2025-4199"},{"source":"nvd","source_id":"CVE-2017-18887","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18887"}],"summary":"Mattermost Server exposes team creator's e-mail address to other members in github.com/mattermost/mattermost-server"}