{"id":"CVE-2023-6547","aliases":["BIT-mattermost-2023-6547","EUVD-2023-58777","GHSA-4gj5-jpg2-r4vj"],"status":"published","title":"Playbooks access/modification by removed team member","description":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00317,"percentile":0.24872,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-284"],"published":"2023-12-12T08:22:41Z","modified":"2026-10-28T02:30:28Z","fixes":[{"ecosystem":"Bitnami","package":"mattermost","fixed_in":["8.1.6","9.2.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mattermost","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.1.6"},{"introduced":"9.2.0"},{"fixed":"9.2.2"}]}]}],"products":[{"vendor":"mattermost","product":"mattermost"},{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["x_transferred","Issue Tracking","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6547","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-4gj5-jpg2-r4vj"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6547.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-6547","title":"Playbooks access/modification by removed team member","description":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team. \n\n","status":"published","published":"2023-12-12T08:22:41.419Z","modified":"2025-05-12T19:28:29.898Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:35:25.095989Z"}],"euvd":[{"id":"EUVD-2023-58777","description":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team. \n\n","status":"published","published":"2023-12-12T08:22:41Z","modified":"2025-05-12T19:28:29Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T20:32:49.308721Z"}],"ghsa":[{"id":"GHSA-4gj5-jpg2-r4vj","title":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing...","description":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team. \n\n","status":"published","published":"2023-12-12T09:30:33Z","modified":"2023-12-12T09:30:39Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"low"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:55:10.896568Z"}],"nvd":[{"id":"CVE-2023-6547","description":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team. \n\n","status":"published","published":"2023-12-12T09:15:09.857Z","modified":"2026-06-17T06:50:57.887Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:08:54.010507Z"}],"osv":[{"id":"CVE-2023-6547","title":"Playbooks access/modification by removed team member","description":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team. \n\n","status":"published","published":"2023-12-12T08:22:41.419Z","modified":"2026-10-28T02:30:28.13756001Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"low"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:44:36.851042Z"},{"id":"BIT-mattermost-2023-6547","description":"Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team.","status":"published","published":"2024-03-06T10:56:43.005Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}