{"id":"CVE-2017-18921","aliases":["EUVD-2017-10011","GHSA-qhhc-q234-w8w6"],"status":"published","title":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on...","description":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on an error page.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00685,"percentile":0.52859,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2020-06-19T19:21:28Z","modified":"2026-10-24T10:30:24Z","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-2017-18921"},{"url":"https://github.com/advisories/GHSA-qhhc-q234-w8w6"}],"sources":{"cve":[{"id":"CVE-2017-18921","description":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on an error page.","status":"published","published":"2020-06-19T19:21:28Z","modified":"2024-08-05T21:45:24.533Z","updated_at":"2026-11-02T14:33:21.747294Z"}],"euvd":[{"id":"EUVD-2017-10011","description":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on an error page.","status":"published","published":"2020-06-19T19:21:28Z","modified":"2024-08-05T21:45:24Z","updated_at":"2026-11-03T02:23:04.612289Z"}],"ghsa":[{"id":"GHSA-qhhc-q234-w8w6","title":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on...","description":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on an error page.","status":"published","published":"2022-05-24T17:21:08Z","modified":"2023-01-29T05:03:06Z","updated_at":"2026-11-02T14:45:14.655741Z"}],"nvd":[{"id":"CVE-2017-18921","description":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on an error page.","status":"published","published":"2020-06-19T20:15:12.773Z","modified":"2026-06-17T01:13:50.07Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:04:21.160774Z"}],"osv":[{"id":"CVE-2017-18921","description":"An issue was discovered in Mattermost Server before 3.6.0 and 3.5.2. XSS can occur via a link on an error page.","status":"published","published":"2020-06-19T20:15:12.773Z","modified":"2026-10-24T10:30:24.760969194Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:05.486486Z"}]}}