CVE-2016-9464
Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as…
- Published
- Updated
- Reserved
- Assigned by
- hackerone
Description
Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.
Timeline
ID reserved
By hackerone
- 4 months later
· 4 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium4.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.6% · top 24% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
Affected products
Nextcloud Server Nextcloud Server before 9.0.54 and 10.0.0
- affected Nextcloud Server Nextcloud Server before 9.0.54 and 10.0.0
References (7)
- https://github.com/nextcloud/server/commit/7289cb5ec0b812992ab0dfb889744b94bc0994f0 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nextcloud/server/commit/3387e5d00fcf6b2ea6b285a091e5743f545e7202 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nextcloud/server/commit/a5471b4a3e3f30e99e4de39c97c0c3b3c2f1618f (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/nextcloud/server/commit/e2c4f4f9aa11bc92e8f2212cce73841b922187e8 (opens in a new tab)x_refsource_MISCx_transferred
- 97287 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://nextcloud.com/security/advisory/?id=nc-sa-2016-007 (opens in a new tab)x_refsource_MISCx_transferred
- https://hackerone.com/reports/153905 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-9464)Record last updated .