{"id":"CVE-2019-20867","details":"An issue was discovered in Mattermost Server before 5.11.0. An attacker can interfere with a channel's post loading via one crafted post.","modified":"2026-04-11T21:02:17.393882Z","published":"2020-06-19T16:15:10.327Z","references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"692d1be91eafb64328ce21bcd18671288eb5139b"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"5.11.0"}],"source":"CPE_FIELD"}}],"versions":["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","v5.10.0","v5.10.0-rc1","v5.10.0-rc2","v5.10.0-rc3","v5.10.0-rc4","v5.10.0-rc5","v5.10.0-rc6","v5.10.1","v5.10.1-rc1","v5.11.0-rc1","v5.11.0-rc2","v5.2.0-rc1","v5.2.0-rc2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-20867.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}