{"id":"CVE-2019-20887","details":"An issue was discovered in Mattermost Server before 5.7.1, 5.6.4, 5.5.3, and 4.10.6. It does not honor flags API permissions when deciding whether a user can receive intra-team posts.","modified":"2026-07-08T19:50:31.283095Z","published":"2020-06-19T17:15:13.897Z","references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"f864d327b53e7d23ee7362fb94f6c857971e2875"},{"introduced":"826252252404c13bf564a8c4fd51616fc2cc4df9"},{"fixed":"8e0e9672269b4fddbf9e1329eb44e654e40edb1e"},{"introduced":"0c1207215852a8726c3f09dea157d597fec368df"},{"fixed":"4dcd132c1494f53cf6a2ab5cb24a3425a4bc1089"},{"introduced":"7e5fda43bda67cd061e527b64046f241c2d6cc32"},{"fixed":"ad3ddac9b935fb842ca4301f69266ffb87ec8c86"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"4.10.6"},{"introduced":"5.5.0"},{"fixed":"5.5.3"},{"introduced":"5.6.0"},{"fixed":"5.6.4"},{"introduced":"5.7.0"},{"fixed":"5.7.1"}],"source":"CPE_RANGE"}}],"versions":["v5.5.2-rc1","v5.5.2","v5.6.3-rc1","v5.6.3","v5.7.0-rc6","v5.7.0","v4.10.5-rc1","v4.10.5","v4.10.4-rc1","v4.10.4","v5.6.2-rc1","v5.6.2","v5.6.1-rc3","v5.6.1-rc2","v5.6.1-rc1","v5.6.1","v5.6.0-rc6","v5.6.0","v5.5.1-rc1","v5.5.1","v5.5.0-rc3","v5.5.0","v4.10.3-rc1","v4.10.3","v4.10.2-rc1","v4.10.2","v4.10.1-rc1","v4.10.1","v4.10.0-rc5","v4.10.0-rc4","v4.10.0","v4.10.0-rc3","v4.10.0-rc2","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-2019-20887.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:L/I:N/A:N"}]}