{"schema_version":"1.7.5","id":"CVE-2017-18872","published":"2020-06-19T18:15:10.537Z","modified":"2026-07-31T18:31:44.641213656Z","aliases":["GHSA-hgrp-fgm8-56g8","GO-2025-4075"],"related":["openSUSE-SU-2025:15710-1","openSUSE-SU-2026:21483-1"],"details":"An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"8f6bb1570dd234c63de5241eff9fbb268aad358c"},{"introduced":"a0017f184578d4d6250a9b54b50e656524078949"},{"fixed":"753386c2b2b06233d8bd977e3db29a4fe18098cb"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"4.3.3"},{"introduced":"4.4.0"},{"fixed":"4.4.3"}],"source":"CPE_RANGE"}}],"versions":["v4.4.2-rc1","v4.4.2","v4.3.2-rc1","v4.3.2","v4.4.1-rc1","v4.4.1","v4.4.0-rc5","v4.4.0-rc4","v4.4.0","v4.3.1-rc2","v4.3.1","v4.3.1-rc1","v4.3.0-rc4","v4.3.0-rc3","v4.3.0","v4.3.0-rc2","v4.3.0-rc1","v4.2.0-rc1","v0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18872.json"}}],"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}