{"id":"CVE-2024-39807","aliases":["EUVD-2024-38239","GHSA-fc2h-j9fj-rh35"],"status":"published","title":"Channel IDs of archived/restored channels leaked via webhook events","description":"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.","severity":{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00345,"percentile":0.28292,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2024-07-03T08:31:58Z","modified":"2026-10-28T02:31:08Z","products":[{"vendor":"mattermost","product":"mattermost"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39807","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-fc2h-j9fj-rh35"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39807.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-39807","title":"Channel IDs of archived/restored channels leaked via webhook events","description":"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.","status":"published","published":"2024-07-03T08:31:58.312Z","modified":"2024-08-02T04:26:16.012Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:34:19.28149Z"}],"euvd":[{"id":"EUVD-2024-38239","description":"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.","status":"published","published":"2024-07-03T08:31:58Z","modified":"2024-08-02T04:26:16Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-03T03:50:17.469599Z"}],"ghsa":[{"id":"GHSA-fc2h-j9fj-rh35","title":"Mattermost versions 9.5.x \u003c= 9.5.5 and 9.8.0 fail to properly sanitize the recipients of a...","description":"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.","status":"published","published":"2024-07-03T18:48:11Z","modified":"2024-07-03T18:48:12Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:57:38.140316Z"}],"nvd":[{"id":"CVE-2024-39807","description":"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.","status":"published","published":"2024-07-03T09:15:07.21Z","modified":"2026-06-17T07:42:50.53Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:10:10.545705Z"}],"osv":[{"id":"CVE-2024-39807","title":"Channel IDs of archived/restored channels leaked via webhook events","description":"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.","status":"published","published":"2024-07-03T08:31:58.312Z","modified":"2026-10-28T02:31:08.759747253Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:44:41.618074Z"}]}}