{"id":"CVE-2020-8259","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-8259","generatedAt":"2026-10-27T22:24:56.755Z","title":"Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the encryption keys.","description":"Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the encryption keys.","published":"2020-11-16T01:15:14.000Z","lastModified":"2026-06-17T03:26:09.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-522"],"affected":["nextcloud/nextcloud server"],"epss":{"score":0.00736,"percentile":0.54188,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://hackerone.com/reports/732431","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2020-041","tags":["Broken Link","Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/732431","tags":["Exploit","Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2020-041","tags":["Broken Link","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-8259","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}