{"cve":"CVE-2018-21258","nvd":{"published":"2020-06-19T17:15:12.787","modified":"2026-06-17T01:54:29.113","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-74"],"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-2018-21258","score":0.01165,"percentile":0.67307,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5mh6-p63g-3mv5","url":"https://osv.dev/vulnerability/GHSA-5mh6-p63g-3mv5","summary":"Mattermost Server is vulnerable to a Denial of Service attack through `invite_people` command","modified":"2025-11-25T18:57:48.725937Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["<5.1.0"],"fixed":["5.1.0"]}]},{"id":"GO-2025-4146","url":"https://osv.dev/vulnerability/GO-2025-4146","summary":"Mattermost Server is vulnerable to a Denial of Service attack through `invite_people` command in github.com/mattermost/mattermost-server","modified":"2026-03-03T04:57:39.674951Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","ranges":["<5.1.0"],"fixed":["5.1.0"]}]}],"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."]}