{"schemaVersion":3,"id":"CVE-2020-8296","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Nextcloud Server prior to 20.0.0 stores passwords in a recoverable format even when external storage is not configured.","dates":{"published":"2021-03-03T17:40:33.000Z","modified":"2024-08-04T09:56:28.293Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.7,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.7,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.6,"severity":"medium","vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00512,"percentile":0.42439,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00512},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00512,"percentile":0.42439}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00512,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00512,"percentile":0.42439}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_NEXTCLOUD_SERVER","name":"Server","source":"github","url":"https://github.com/nextcloud/server/issues/17439","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_409C43B59B168A57","name":"Exploit Reference (hackerone.com)","source":"reference","url":"https://hackerone.com/reports/867164","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":2,"weaknesses":[{"id":"CWE-257","name":"Storing Passwords in a Recoverable Format","description":"The storage of passwords in a recoverable format makes them subject to password reuse attacks by malicious users. In fact, it should be noted that recoverable encrypted passwords provide no significant benefit over plaintext passwords since they are subject not only to reuse by malicious attackers but also by malicious insiders. If a system administrator can recover a password directly, or use a brute force search on the available information, the administrator can use the password on other accounts.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/257.html"},{"id":"CWE-521","name":"Weak Password Requirements","description":"The product does not require that users should have strong passwords.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/521.html"}],"affected":[{"vendor":"fedoraproject","product":"fedora","name":"fedora","label":"fedora","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"34","noFixRecorded":false,"fixedIn":null}],"versionsText":"34","eol":{"isEol":true,"eolDate":"2022-06-07T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"34","label":"34","eolFrom":"2022-06-07T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":null},"product":{"name":"fedora","label":"Fedora Linux","category":"os"}},"hubHref":"/vendor/fedoraproject/fedora"},{"vendor":"nextcloud","product":"nextcloud_server","name":"nextcloud server","label":"nextcloud_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 20.0.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 20.0.0","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"nextcloud","label":"Nextcloud","category":"server-app"}},"hubHref":"/vendor/nextcloud/nextcloud_server"}],"affectedCount":2,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://hackerone.com/reports/867164","label":"hackerone.com/reports/867164","hostname":"hackerone.com","tags":["X Refsource MISC","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2021-006","label":"nextcloud.com/security/advisory/?id=NC-SA-2021-006","hostname":"nextcloud.com","tags":["X Refsource MISC","Vendor Advisory"]},{"url":"https://github.com/nextcloud/server/pull/21037","label":"github.com/nextcloud/server/pull/21037","hostname":"github.com","tags":["X Refsource MISC","Patch","Third Party Advisory"]},{"url":"https://github.com/nextcloud/server/issues/17439","label":"github.com/nextcloud/server/issues/17439","hostname":"github.com","tags":["X Refsource MISC","Exploit","Third Party Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-03-03T17:40:33.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T09:56:28.293Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":37,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T04:38:53.480Z","stale":false,"partial":false}}