{"id":"CVE-2020-8227","aliases":["DEBIAN-CVE-2020-8227","EUVD-2020-29099","GHSA-64gg-6m36-39px","UBUNTU-CVE-2020-8227"],"status":"published","title":"Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a...","description":"Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.","severity":{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.25769,"percentile":0.97995,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22"],"published":"2020-08-21T20:33:44Z","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/590319","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2020-032","tags":["x_refsource_MISC","x_transferred","Broken Link","Exploit","Vendor Advisory","evidence","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-2020-8227"},{"url":"https://github.com/advisories/GHSA-64gg-6m36-39px"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-8227","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-8227","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-8227","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-8227","description":"Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.","status":"published","published":"2020-08-21T20:33:44Z","modified":"2024-08-04T09:56:27.442Z","cwes":["CWE-22"],"updated_at":"2026-11-02T14:35:50.545879Z"}],"euvd":[{"id":"EUVD-2020-29099","description":"Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.","status":"published","published":"2020-08-21T20:33:44Z","modified":"2024-08-04T09:56:27Z","updated_at":"2026-11-03T03:07:58.055641Z"}],"ghsa":[{"id":"GHSA-64gg-6m36-39px","title":"Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a...","description":"Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.","status":"published","published":"2022-05-24T17:26:22Z","modified":"2023-01-29T05:03:38Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:45:21.848692Z"}],"nvd":[{"id":"CVE-2020-8227","description":"Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.","status":"published","published":"2020-08-21T21:15:11.967Z","modified":"2026-06-17T03:26:05.493Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.1,"vector":"AV:N/AC:H/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:06:13.05572Z"}],"osv":[{"id":"CVE-2020-8227","description":"Missing sanitization of a server response in Nextcloud 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allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.","status":"published","published":"2020-08-21T21:15:00Z","modified":"2026-04-22T12:43:25.725703Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:25.728622Z"}]}}