{"id":"CVE-2025-27715","details":"Mattermost versions 9.11.x \u003c= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.","aliases":["BIT-mattermost-2025-27715","GHSA-cw7q-5cgc-h3h9","GO-2025-3555"],"modified":"2026-02-04T02:47:27.727757Z","published":"2025-03-21T09:15:13.100Z","related":["openSUSE-SU-2025:14937-1"],"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"0bc2ddd42375a75ab14e63f038165150d4f07659"},{"fixed":"07bb4f96ed7400080f2ded5e910a947b8e6c168f"}]}],"versions":["@mattermost/client@9.11.0","@mattermost/types@9.11.0","v9.11.0","v9.11.0-rc3","v9.11.1","v9.11.1-rc1","v9.11.2","v9.11.2-rc1","v9.11.2-rc2","v9.11.3","v9.11.3-rc1","v9.11.3-rc2","v9.11.4","v9.11.4-rc1","v9.11.5","v9.11.5-rc1","v9.11.6","v9.11.6-rc1","v9.11.6-rc2","v9.11.7","v9.11.7-rc1","v9.11.7-rc2","v9.11.7-rc3","v9.11.8","v9.11.9-rc1","v9.11.9-rc2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-27715.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N"}]}