{"id":"CVE-2016-9461","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-9461","generatedAt":"2026-10-28T20:05:39.298Z","title":"This allowed an authenticated attacker with access to a read-only share to put new files in there.","description":"Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying edit check permissions on WebDAV copy actions. The WebDAV endpoint was not properly checking the permission on a WebDAV COPY action. This allowed an authenticated attacker with access to a read-only share to put new files in there. It was not possible to modify existing files.","published":"2017-03-28T02:59:01.000Z","lastModified":"2026-06-17T00:56:07.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.0","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-275","CWE-284"],"affected":["nextcloud/nextcloud server","owncloud/owncloud"],"epss":{"score":0.02,"percentile":0.80656,"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 (2.00%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/97276","tags":["Third Party Advisory","VDB Entry"],"source":"support@hackerone.com"},{"url":"https://github.com/nextcloud/server/commit/3491400261c1454a9a30d3ec96969573330120cc","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://github.com/owncloud/core/commit/0622e635d97cb17c5e1363e370bb8268cc3d2547","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://github.com/owncloud/core/commit/121a3304a0c37ccda0e1b63ddc528cba9121a36e","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://github.com/owncloud/core/commit/acbbadb71ceee7f01da347f7dcd519beda78cc47","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://github.com/owncloud/core/commit/c0a4b7b3f38ad2eaf506484b3b92ec678cb021c9","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/145950","tags":["Exploit","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-004","tags":["Patch","Vendor Advisory"],"source":"support@hackerone.com"},{"url":"https://owncloud.org/security/advisory/?id=oc-sa-2016-014","tags":["Patch","Vendor Advisory"],"source":"support@hackerone.com"},{"url":"http://www.securityfocus.com/bid/97276","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/nextcloud/server/commit/3491400261c1454a9a30d3ec96969573330120cc","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/owncloud/core/commit/0622e635d97cb17c5e1363e370bb8268cc3d2547","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/owncloud/core/commit/121a3304a0c37ccda0e1b63ddc528cba9121a36e","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/owncloud/core/commit/acbbadb71ceee7f01da347f7dcd519beda78cc47","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/owncloud/core/commit/c0a4b7b3f38ad2eaf506484b3b92ec678cb021c9","tags":["Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/145950","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://nextcloud.com/security/advisory/?id=nc-sa-2016-004","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://owncloud.org/security/advisory/?id=oc-sa-2016-014","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-9461","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."}