{"id":"CVE-2019-15621","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-15621","generatedAt":"2026-10-29T00:46:37.156Z","title":"Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions when sharing the mount point of a share they received, as a public link.","description":"Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions when sharing the mount point of a share they received, as a public link.","published":"2020-02-04T20:15:13.000Z","lastModified":"2026-06-17T02:20:46.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-281"],"affected":["nextcloud/nextcloud server"],"epss":{"score":0.01056,"percentile":0.64259,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.06%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html","source":"support@hackerone.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html","source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/619484","tags":["Permissions Required"],"source":"support@hackerone.com"},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2020-012","tags":["Vendor Advisory"],"source":"support@hackerone.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/619484","tags":["Permissions Required"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2020-012","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-15621","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."}