{"schema_version":"1.9.0","id":"CVE-2017-18870","published":"2020-06-19T17:15:11.787Z","modified":"2026-08-27T08:19:01.756739Z","aliases":["GHSA-9j9j-mm2r-9rfm","GO-2025-4183"],"related":["SUSE-SU-2025:4395-1","openSUSE-SU-2026:21483-1"],"details":"An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, and 4.3.4. It mishandled webhook access control in the EnableOnlyAdminIntegrations case.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"8f6bb1570dd234c63de5241eff9fbb268aad358c"},{"introduced":"a0017f184578d4d6250a9b54b50e656524078949"},{"fixed":"3890bc7079bf21330efdc45ae2741a4392d99e3c"},{"introduced":"5358b9c42cc99f72e7844062f28b2ddc3642a339"},{"last_affected":"03f5c939deb4a6ab2fd01639b5570799e4118bab"}],"database_specific":{"cpe":["cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc1:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc2:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc3:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc4:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"fixed":"4.3.4"},{"introduced":"4.4.0"},{"fixed":"4.4.5"},{"introduced":"4.5.0-rc1"},{"last_affected":"4.5.0-rc1"},{"introduced":"4.5.0-rc2"},{"last_affected":"4.5.0-rc2"},{"introduced":"4.5.0-rc3"},{"last_affected":"4.5.0-rc3"},{"introduced":"4.5.0-rc4"},{"last_affected":"4.5.0-rc4"}],"source":["CPE_RANGE","CPE_STRING"]}}],"versions":["4.5.0-rc1","4.5.0-rc2","v4.5.2-rc1","v4.5.2","v4.5.1-rc1","v4.5.1","v4.5.0-rc4","v4.5.0-rc3","v4.5.0-rc2","v4.5.0","v4.5.0-rc1","v4.4.3-rc1","v4.4.3","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-2017-18870.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"}]}