{"id":"CVE-2024-42406","aliases":["BIT-mattermost-2024-42406","EUVD-2024-39606","GHSA-v53q-gwp7-274v"],"status":"published","title":"Unauthorized access on archived channels","description":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.","severity":{"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":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00221,"percentile":0.12727,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-284"],"published":"2024-09-26T08:04:22Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"Bitnami","package":"mattermost","fixed_in":["9.5.9","9.9.3","9.10.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mattermost","ranges":[{"type":"SEMVER","events":[{"introduced":"9.5.0"},{"fixed":"9.5.9"},{"introduced":"9.9.0"},{"fixed":"9.9.3"},{"introduced":"9.10.0"},{"fixed":"9.10.2"}]},{"type":"SEMVER","events":[{"introduced":"9.11.0-rc1"},{"last_affected":"9.11.0-rc1"},{"introduced":"9.11.0-rc2"},{"last_affected":"9.11.0-rc2"},{"introduced":"9.11.0-rc3"},{"last_affected":"9.11.0-rc3"},{"introduced":"9.11.0"},{"last_affected":"9.11.0"}]}]}],"products":[{"vendor":"mattermost","product":"mattermost"},{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-42406","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-v53q-gwp7-274v"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42406.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-42406","title":"Unauthorized access on archived channels","description":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.","status":"published","published":"2024-09-26T08:04:22.939Z","modified":"2024-09-26T13:11:34.682Z","cvss":[{"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":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:34:03.00063Z"}],"euvd":[{"id":"EUVD-2024-39606","description":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.","status":"published","published":"2024-09-26T08:04:22Z","modified":"2024-09-26T13:11:34Z","cvss":[{"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"}],"updated_at":"2026-11-03T00:28:10.832665Z"}],"ghsa":[{"id":"GHSA-v53q-gwp7-274v","title":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to...","description":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.","status":"published","published":"2024-09-26T09:31:41Z","modified":"2024-09-26T09:31:47Z","cvss":[{"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"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:58:20.799511Z"}],"nvd":[{"id":"CVE-2024-42406","description":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.","status":"published","published":"2024-09-26T08:15:05.81Z","modified":"2026-06-17T07:49:24.2Z","cvss":[{"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":"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":"2026-11-02T14:10:29.044588Z"}],"osv":[{"id":"CVE-2024-42406","title":"Unauthorized access on archived channels","description":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.","status":"published","published":"2024-09-26T08:04:22.939Z","modified":"2026-10-28T02:30:45.062797245Z","cvss":[{"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"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:44:42.322107Z"},{"id":"BIT-mattermost-2024-42406","description":"Mattermost versions 9.11.x \u003c= 9.11.0, 9.10.x \u003c= 9.10.1, 9.9.x \u003c= 9.9.2 and 9.5.x \u003c= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.","status":"published","published":"2024-10-02T07:15:56.054Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}