{"id":"CVE-2023-2787","details":"Mattermost fails to check channel membership when accessing message threads, allowing an attacker to access arbitrary posts by using the message threads API.\n\n","modified":"2026-04-11T12:45:05.160254Z","published":"2023-06-16T09:15:09.920Z","database_specific":{},"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"25e8c1fcddb1154de49480eb5cd7eb085507d138"},{"last_affected":"96cf6c0f7a0c2e98815dbd9397c8de79528ae306"},{"introduced":"f14c24391ca84740d90a29ec8b67579326eaa236"},{"last_affected":"b3eb2e451e18b4003634954c2c4be678695dc26a"},{"introduced":"c4d8c1450ab2b9538bbc2690ca1ee865567a5888"},{"last_affected":"27b2437e0f93d3f48b9caebdceb7795b64d5cd9f"},{"introduced":"0"},{"last_affected":"5b33575d571469115f29720530ff5b53a6cb7de5"}],"database_specific":{"source":"CPE_FIELD","extracted_events":[{"introduced":"7.1.0"},{"last_affected":"7.1.9"},{"introduced":"7.8.0"},{"last_affected":"7.8.4"},{"introduced":"7.9.0"},{"last_affected":"7.9.3"},{"introduced":"0"},{"last_affected":"7.10.0"}],"cpe":["cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*","cpe:2.3:a:mattermost:mattermost:7.10.0:*:*:*:*:*:*:*"]}}],"versions":["cloud-2022-07-20-1","cloud-2022-08-10-1","cloud-2022-09-08-1","cloud-2022-10-06-1","cloud-2022-11-11-1","cloud-2022-11-24-1","cloud-2023-03-29-1","v0.5.0","v4.10.0-rc1","v4.2.0-rc1","v4.3.0-rc1","v4.4.0-rc1","v4.5.0-rc1","v4.6.0-rc1","v4.6.0-rc2","v4.7.0-rc1","v4.8.0-rc1","v4.9.0-rc1","v5.0.0-rc1","v5.1.0-rc1","v5.2.0-rc1","v5.2.0-rc2","v7.1.0","v7.1.1","v7.1.2","v7.1.3","v7.1.4","v7.1.5","v7.1.6","v7.1.7","v7.1.8","v7.1.9","v7.10.0","v7.8.0","v7.8.1","v7.8.2","v7.8.3","v7.8.4","v7.9.0","v7.9.1","v7.9.2","v7.9.3"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-2787.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}