{"cve":"CVE-2017-18917","nvd":{"published":"2020-06-19T20:15:12.523","modified":"2026-06-17T01:13:49.627","status":"Modified","description":"An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. Weak hashing was used for e-mail invitations, OAuth, and e-mail verification tokens.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-916"],"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-2017-18917","score":0.00717,"percentile":0.53845,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-jxc4-w54c-qv5r","url":"https://osv.dev/vulnerability/GHSA-jxc4-w54c-qv5r","summary":"Mattermost Server uses weak hashing for OAuth, email verification tokens and invitations","modified":"2026-02-19T20:41:04.609917Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["<3.7.5-0.20170421192444-247cd1e51a8c"],"fixed":["3.7.5-0.20170421192444-247cd1e51a8c"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=3.8.0 <3.8.2"],"fixed":["3.8.2"]}]},{"id":"GO-2026-4463","url":"https://osv.dev/vulnerability/GO-2026-4463","summary":"Mattermost Server uses weak hashing for OAuth, email verification tokens and invitations in github.com/mattermost/mattermost-server","modified":"2026-02-19T20:41:04.609917Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=3.8.0+incompatible <3.8.2+incompatible"],"fixed":["3.8.2+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."]}