{"id":"CVE-2024-39807","details":"Mattermost versions 9.5.x \u003c= 9.5.5 and 9.8.0 fail to properly sanitize the recipients of a webhook event which allows an attacker monitoring webhook events to retrieve the channel IDs of archived or restored channels.","modified":"2026-03-13T07:56:12.741347Z","published":"2024-07-03T09:15:07.210Z","references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"99d819d25d0b16b3faed901b1fe5c41de7655e9c"},{"fixed":"01723a784c5ed96feb0f5c90518f8078ae798178"},{"introduced":"015002180e109f0384c511a01dede846c549ce35"},{"fixed":"6eb3d42f52be6d36ff6a931f2be44e3f7cdebe38"}],"database_specific":{"versions":[{"introduced":"9.5.0"},{"fixed":"9.5.6"},{"introduced":"9.8.0"},{"fixed":"9.8.1"}]}}],"versions":["@mattermost/client@9.5.0","@mattermost/client@9.8.0","@mattermost/types@9.5.0","@mattermost/types@9.8.0","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-rc1","v9.5.6-rc2","v9.8.0","v9.8.0-rc4","v9.8.1-rc1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-39807.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}