{"id":"CVE-2017-18884","details":"An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to gain privileges by using a registered OAuth application with personal access tokens.","aliases":["GHSA-876j-jfqf-m7j7","GO-2025-4197"],"modified":"2026-07-08T05:47:51.258424756Z","published":"2020-06-19T19:15:10.373Z","related":["SUSE-SU-2025:4395-1"],"database_specific":{"unresolved_ranges":[{"vendor_product":"mattermost:mattermost_server","source":"CPE_STRING","extracted_events":[{"introduced":"4.3.0-rc1"},{"last_affected":"4.3.0-rc1"},{"introduced":"4.3.0-rc3"},{"last_affected":"4.3.0-rc3"}],"cpes":["cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc1:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc3:*:*:*:*:*:*"]}]},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"61d6a7434b18612c52d0d6b7565032065262e096"},{"introduced":"a5ce36d0882ae1b4b409a7b68233bf89591a5f95"},{"fixed":"c0aafbcdc221970054869b6c03db77c1dcc63289"},{"introduced":"2a76eeeeee9acdd9aaebc3ec94a40254b933c966"},{"last_affected":"8966452d1183e94fecc373b9d08c65a0573cbbc6"}],"database_specific":{"source":["CPE_RANGE","CPE_STRING"],"extracted_events":[{"introduced":"0"},{"fixed":"4.1.2"},{"introduced":"4.2.0"},{"fixed":"4.2.1"},{"introduced":"4.3.0-rc1"},{"last_affected":"4.3.0-rc1"},{"introduced":"4.3.0-rc2"},{"last_affected":"4.3.0-rc2"},{"introduced":"4.3.0-rc3"},{"last_affected":"4.3.0-rc3"},{"introduced":"4.3.0-rc4"},{"last_affected":"4.3.0-rc4"}],"cpe":["cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc1:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc2:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc3:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.3.0:rc4:*:*:*:*:*:*"]}}],"versions":["4.3.0-rc1","4.3.0-rc2","4.3.0-rc3","v4.3.0-rc4","v4.3.0-rc3","v4.3.0","v4.3.0-rc2","v4.3.0-rc1","v4.1.1-rc1","v4.1.1","v4.2.0-rc4","v4.2.0","v4.1.0","v0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18884.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}