{"id":"CVE-2019-20867","aliases":["EUVD-2019-11404","GHSA-2xqm-cm83-qxwh"],"status":"published","title":"An issue was discovered in Mattermost Server before 5.11.0. An attacker can interfere with a...","description":"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.","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":0.5721,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2020-06-19T15:18:25Z","modified":"2026-10-24T10:31:02Z","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-2019-20867"},{"url":"https://github.com/advisories/GHSA-2xqm-cm83-qxwh"}],"sources":{"cve":[{"id":"CVE-2019-20867","description":"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.","status":"published","published":"2020-06-19T15:18:25Z","modified":"2024-08-05T02:53:09.455Z","updated_at":"2026-11-02T14:20:17.722148Z"}],"euvd":[{"id":"EUVD-2019-11404","description":"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.","status":"published","published":"2020-06-19T15:18:25Z","modified":"2024-08-05T02:53:09Z","updated_at":"2026-11-03T02:40:20.270172Z"}],"ghsa":[{"id":"GHSA-2xqm-cm83-qxwh","title":"An issue was discovered in Mattermost Server before 5.11.0. An attacker can interfere with a...","description":"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.","status":"published","published":"2022-05-24T17:21:12Z","modified":"2023-01-29T05:02:56Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:45:12.348503Z"}],"nvd":[{"id":"CVE-2019-20867","description":"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.","status":"published","published":"2020-06-19T16:15:10.327Z","modified":"2026-06-17T02:31:20.8Z","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-2019-20867","description":"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.","status":"published","published":"2020-06-19T16:15:10.327Z","modified":"2026-10-24T10:31:02.207610242Z","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"}]}}