{"schema_version":"1.7.3","id":"GHSA-hgrp-fgm8-56g8","published":"2022-05-24T17:21:02Z","modified":"2025-11-05T19:57:43.428437Z","aliases":["CVE-2017-18872","GO-2025-4075"],"summary":"Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization","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":[{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.3.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-hgrp-fgm8-56g8/GHSA-hgrp-fgm8-56g8.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.4.0-rc1"},{"fixed":"4.4.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-hgrp-fgm8-56g8/GHSA-hgrp-fgm8-56g8.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18872"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/8f6bb1570dd234c63de5241eff9fbb268aad358c"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"WEB","url":"http://github.com/mattermost/mattermost/commit/753386c2b2b06233d8bd977e3db29a4fe18098cb"}],"database_specific":{"cwe_ids":["CWE-862"],"github_reviewed":true,"github_reviewed_at":"2025-10-24T18:39:08Z","nvd_published_at":"2020-06-19T18:15:00Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}