{"schema_version":"1.9.0","id":"CVE-2025-55074","published":"2025-11-18T15:23:29.642Z","modified":"2026-08-12T03:51:26.595717019Z","aliases":["GHSA-9hh7-6558-qfp2","GO-2025-4133"],"related":["SUSE-SU-2025:4395-1","openSUSE-SU-2026:21483-1"],"summary":"Channel member objects leak read status","details":"Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"58bd34fd34cbd7d3da777d627b6cffdf8a532930"},{"fixed":"9fa25cd55b43d735a39c6925d7e0021697ae049d"},{"introduced":"5b955468ea1ea8b56c0fb10feb258a36a767d7bb"},{"fixed":"83a5be3f9ed65d8457ab8cca853826d0c8425a8b"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"10.5.0"},{"fixed":"10.5.12"},{"introduced":"10.11.0"},{"fixed":"10.11.4"}],"source":"CPE_RANGE"}}],"versions":["v10.11.4-rc2","v10.5.12-rc1","v10.11.4-rc1","v10.11.3","v10.5.11","v10.11.2-rc2","v10.11.2","v10.5.11-rc1","v10.11.2-rc1","v10.5.10","v10.11.1","v10.5.10-rc2","v10.11.1-rc1","v10.11.0-rc3","v10.11.0","mattermost-redux@10.11.0","@mattermost/types@10.11.0","@mattermost/client@10.11.0","v10.5.10-rc1","v10.5.9","v10.5.9-rc4","v10.5.9-rc3","v10.5.9-rc2","v10.5.9-rc1","v10.5.8","v10.5.8-rc1","v10.5.7","v10.5.6-rc1","v10.5.6","v10.5.5","v10.5.5-rc1","v10.5.4-rc2","v10.5.4","v10.5.4-rc1","v10.5.3","v10.5.3-rc1","v10.5.2","v10.5.1","v10.5.1-rc2","v10.5.1-rc1","v10.5.0-rc6","v10.5.0","@mattermost/types@10.5.0","@mattermost/client@10.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-55074.json"}}],"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55074.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55074"}],"database_specific":{"cna_assigner":"Mattermost","cwe_ids":["CWE-1426"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55074.json","unresolved_ranges":[{"extracted_events":[{"introduced":"10.11.0"},{"last_affected":"10.11.3"},{"introduced":"10.5.0"},{"last_affected":"10.5.11"}],"source":"AFFECTED_FIELD"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N"}]}