{"id":"CVE-2024-39837","details":"Mattermost versions 9.9.x \u003c= 9.9.0, 9.5.x \u003c= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.","aliases":["BIT-mattermost-2024-39837","GHSA-vvpg-55p7-5h8w","GO-2024-3032"],"modified":"2025-11-15T23:02:37.481960Z","published":"2024-08-01T15:15:12.790Z","references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"99d819d25d0b16b3faed901b1fe5c41de7655e9c"},{"fixed":"55b24d27c857936c742992b6e3ca94bb2c5c3dac"}]}],"versions":["@mattermost/client@9.5.0","@mattermost/types@9.5.0","v9.5.0","v9.5.0-rc3","v9.5.1","v9.5.1-rc1","v9.5.2","v9.5.3","v9.5.3-rc1","v9.5.3-rc2","v9.5.3-rc3","v9.5.4","v9.5.4-rc1","v9.5.4-rc2","v9.5.5","v9.5.5-rc1","v9.5.6","v9.5.6-rc1","v9.5.6-rc2","v9.5.7-rc1","v9.5.7-rc2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-39837.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}