{"id":"CVE-2017-18909","details":"An issue was discovered in Mattermost Server before 3.9.0 when SAML is used. Encryption and signature verification are not mandatory.","aliases":["GHSA-r6j5-fqx9-7qv9","GO-2026-4478"],"modified":"2026-03-14T09:25:31.756118Z","published":"2020-06-19T19:15:11.827Z","related":["SUSE-SU-2026:0757-1"],"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"0"},{"fixed":"ae3a62ef95e22ff67236e8addb1e4ca005307443"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"3.9.0"}]}}],"versions":["v0.5.0","v0.6.0","v1.0.0","v1.1.0","v1.1.1","v1.2.1","v1.3.0","v1.4.0","v2.0.0","v3.0.0","v3.0.1","v3.0.2","v3.0.3","v3.1.0","v3.2.0","v3.3.0","v3.4.0","v3.5.0","v3.5.1","v3.6.0","v3.6.1","v3.7.0","v3.7.1","v3.7.2","v3.7.3","v3.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18909.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}