{"id":"CVE-2018-21258","aliases":["GHSA-5mh6-p63g-3mv5","GO-2025-4146"],"url":"https://o3.security/vulnerability/CVE-2018-21258","summary":"Mattermost Server is vulnerable to a Denial of Service attack through `invite_people` command","details":"An issue was discovered in Mattermost Server before 5.1. It allows attackers to cause a denial of service via the invite_people slash command.","published":"2020-06-19T17:15:12.787Z","modified":"2026-07-31T18:31:16.911991539Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"5.1.0"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/af615ffc24b774d76deef8c93282831432669dd8","label":"mattermost/mattermost@af615ff"},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-21258"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/af615ffc24b774d76deef8c93282831432669dd8"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T18:31:16.911991539Z"}}