{"id":"CVE-2023-1775","summary":"Unsanitized events sent over Websocket to regular users in a High Availability environment","details":"When running in a High Availability configuration, Mattermost fails to sanitize some of the user_updated and post_deleted events broadcast to all users, leading to disclosure of sensitive information to some of the users with currently connected Websocket clients.\n\n\n","aliases":["BIT-mattermost-2023-1775","GHSA-8jhh-3jf2-pfwr"],"modified":"2026-08-12T03:51:36.018217346Z","published":"2023-03-31T11:26:21.640Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1775.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"3.3.0"},{"last_affected":"7.7.1"},{"introduced":"3.3.0"},{"last_affected":"7.1.5"},{"introduced":"3.3.0"},{"fixed":"7.8.0"}]}],"cna_assigner":"Mattermost","cwe_ids":["CWE-200"]},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1775.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1775"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"5a8ebc95d0cbf61d974430d4c03c3ffef36d4543"},{"introduced":"63149c4869898f8c1d3a94ea728370ec4a07575f"},{"last_affected":"63149c4869898f8c1d3a94ea728370ec4a07575f"}],"database_specific":{"source":["CPE_RANGE","CPE_STRING"],"cpe":["cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost_server:7.7.1:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"fixed":"7.1.6"},{"introduced":"7.7.1"},{"last_affected":"7.7.1"}]}}],"versions":["7.7.1","v7.7.1","v7.1.5","v7.1.4","v7.1.3","v7.1.2","v7.1.1","v7.1.0","cloud-2022-06-29-1","v5.2.0-rc2","v5.2.0-rc1","v5.1.0-rc1","v5.0.0-rc1","v4.10.0-rc1","v4.9.0-rc1","v4.8.0-rc1","v4.7.0-rc1","v4.6.0-rc2","v4.6.0-rc1","v4.5.0-rc1","v4.4.0-rc1","v4.3.0-rc1","v4.2.0-rc1","v0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-1775.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}