{"id":"CVE-2020-8189","aliases":["DEBIAN-CVE-2020-8189","EUVD-2020-29067","GHSA-vc58-g8xx-fx3p","UBUNTU-CVE-2020-8189"],"status":"published","title":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html ...","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01401,"percentile":0.72869,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2020-08-21T20:34:54Z","modified":"2026-10-26T12:02:51Z","fixes":[{"ecosystem":"Debian:12","package":"nextcloud-desktop","fixed_in":["3.0.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"nextcloud-desktop","fixed_in":["3.0.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"nextcloud-desktop","fixed_in":["3.0.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"nextcloud-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"nextcloud-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"nextcloud-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.1-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"nextcloud-desktop","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.3-1","2.6.0-1","2.6.1-1","2.6.1-2","2.6.2-1","2.6.2-1build1"]}],"products":[{"vendor":"nextcloud","product":"desktop"}],"references":[{"url":"https://hackerone.com/reports/685552","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2020-027","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory","advisory","report"]},{"url":"https://security.gentoo.org/glsa/202009-09","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8189"},{"url":"https://github.com/advisories/GHSA-vc58-g8xx-fx3p"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-8189","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-8189","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-8189","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-8189","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","status":"published","published":"2020-08-21T20:34:54Z","modified":"2024-08-04T09:56:28.242Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:35:50.88562Z"}],"euvd":[{"id":"EUVD-2020-29067","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","status":"published","published":"2020-08-21T20:34:54Z","modified":"2024-08-04T09:56:28Z","updated_at":"2026-11-03T03:07:57.599144Z"}],"ghsa":[{"id":"GHSA-vc58-g8xx-fx3p","title":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html ...","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","status":"published","published":"2022-05-24T17:26:22Z","modified":"2023-01-29T05:03:38Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:45:21.848692Z"}],"nvd":[{"id":"CVE-2020-8189","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","status":"published","published":"2020-08-21T21:15:11.887Z","modified":"2026-06-17T03:26:01.13Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:13.05572Z"}],"osv":[{"id":"CVE-2020-8189","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","status":"published","published":"2020-08-21T21:15:11.887Z","modified":"2026-10-24T10:30:28.385083268Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:17.663289Z"},{"id":"DEBIAN-CVE-2020-8189","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","status":"published","published":"2020-08-21T21:15:11.887Z","modified":"2026-10-26T12:02:51.547005219Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:34.311861Z"},{"id":"UBUNTU-CVE-2020-8189","description":"A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.","status":"published","published":"2020-08-21T21:15:00Z","modified":"2026-04-22T12:44:24.418944Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:25.728622Z"}]}}