{"id":"CVE-2019-20847","aliases":["EUVD-2019-11384","GHSA-fjfq-pxmf-2j9h"],"status":"published","title":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing...","description":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing WebSocket event to any channel.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00811,"percentile":0.57209,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-06-19T13:31:36Z","modified":"2026-10-24T10:30:49Z","products":[{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates/","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-20847"},{"url":"https://github.com/advisories/GHSA-fjfq-pxmf-2j9h"}],"sources":{"cve":[{"id":"CVE-2019-20847","description":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing WebSocket event to any channel.","status":"published","published":"2020-06-19T13:31:36Z","modified":"2024-08-05T02:53:09.195Z","updated_at":"2026-11-02T14:20:17.11067Z"}],"euvd":[{"id":"EUVD-2019-11384","description":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing WebSocket event to any channel.","status":"published","published":"2020-06-19T13:31:36Z","modified":"2024-08-05T02:53:09Z","updated_at":"2026-11-03T02:40:20.270172Z"}],"ghsa":[{"id":"GHSA-fjfq-pxmf-2j9h","title":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing...","description":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing WebSocket event to any channel.","status":"published","published":"2022-05-24T17:21:11Z","modified":"2023-01-29T05:03:06Z","updated_at":"2026-11-02T14:45:14.655741Z"}],"nvd":[{"id":"CVE-2019-20847","description":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing WebSocket event to any channel.","status":"published","published":"2020-06-19T14:15:10.713Z","modified":"2026-06-17T02:31:18.62Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:05:47.558959Z"}],"osv":[{"id":"CVE-2019-20847","description":"An issue was discovered in Mattermost Server before 5.18.0. An attacker can send a user_typing WebSocket event to any channel.","status":"published","published":"2020-06-19T14:15:10.713Z","modified":"2026-10-24T10:30:49.212243311Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:12.010761Z"}]}}