{"id":"CVE-2021-32655","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-32655","generatedAt":"2026-10-27T20:21:36.782Z","title":"In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share.","description":"Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the sharing panel and tries to remove the \"Create\" privileges of this unexpected share, Nextcloud server would silently grant the share read privileges. The vulnerability is patched in versions 19.0.11, 20.0.10 and 21.0.2. No workarounds are known to exist.","published":"2021-06-01T21:15:08.000Z","lastModified":"2026-06-17T03:53:22.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":3.5,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N"},"cwe":["CWE-241"],"affected":["nextcloud/nextcloud server"],"epss":{"score":0.01034,"percentile":0.63624,"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":"low","text":"Lower severity and a low EPSS score (1.03%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jv","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://hackerone.com/reports/1167929","tags":["Permissions Required","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://security.gentoo.org/glsa/202208-17","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jv","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/1167929","tags":["Permissions Required","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202208-17","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-32655","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."}