{"id":"CVE-2025-27571","aliases":["GHSA-h4rr-f37j-4hh7","GO-2025-3619"],"url":"https://o3.security/vulnerability/CVE-2025-27571","summary":"Channel metadata visible in archived channels despite configuration setting","details":"Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the \"Allow Users to View Archived Channels\" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.","published":"2025-04-16T07:45:58.802Z","modified":"2026-08-12T03:51:42.288348647Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"10.5.2"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"10.4.4"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"9.11.10"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"8.0.0-20250314142426-c049748b8863"}],"fix":{"url":"https://github.com/mattermost/mattermost/commit/341186355d982ac4cbe37668d7cdb0cf6275fe44","label":"mattermost/mattermost@3411863"},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27571.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27571"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/341186355d982ac4cbe37668d7cdb0cf6275fe44"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/629f68a85dd6ed5ba0c51a9356c3a3200f50657f"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/8e82d8df61068fc56b0f3e51ef1cc947bc87cec1"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/ae8a952bcaaa5f77a92043e2538f625eac72e927"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/c6f6b664811795f36b9cf05b0e2b537c44c65bc1"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2025-3619"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:42.288348647Z"}}