{"id":"CVE-2023-6202","aliases":["GHSA-85jj-c9jr-9jhx"],"url":"https://o3.security/vulnerability/CVE-2023-6202","summary":"Insecure Direct Object Reference in /plugins/focalboard/ api/v2/users of Mattermost Boards","details":"Mattermost fails to perform proper authorization in the /plugins/focalboard/api/v2/users endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.\n\n","published":"2023-11-27T09:12:04.786Z","modified":"2026-07-15T01:49:10.199410633Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"9.1.1"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"9.0.2"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"8.1.4"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","fixedVersion":"7.8.13"}],"fix":null,"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6202.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6202"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:10.199410633Z"}}