Improper access control in Nextcloud Server & ownCloud Server Nextcloud Server before…
Priority LOW 24CWE-275Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-284.
Summary
Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are not properly verifying restore privileges when restoring a file. The restore capability of Nextcloud/ownCloud was not verifying whether a user has only read-only access to a share. Thus a user with read-only access was able to restore old versions.
Why it matters now
EPSS 0.01874 79th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 | Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 | — | No fix listed | CNA |
- Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 Vendor— Affected Nextcloud Server & ownCloud Server Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-9462
- 2026-10-03 Alias added: GHSA-xfx5-6q2x-cp8j
References
Exploit 1
Patch 7
- https://github.com/nextcloud/server/commit/1208953ba1d4d55a18a639846bbcdd66a2d5bc5e
- https://github.com/owncloud/core/commit/c93eca49c32428ece03dd67042772d5fa62c8d6e
- https://owncloud.org/security/advisory/?id=oc-sa-2016-015
- https://github.com/owncloud/core/commit/3b056fa68ce502ceb0db9b446dab3b9e7b10dd13
- https://github.com/owncloud/core/commit/d31720b6f1e8c8dfeb5e8805ab35ad7c8000b2f1
- https://github.com/owncloud/core/commit/23383080731d092e079986464a8c4c9ffcb79f4c
- https://nextcloud.com/security/advisory/?id=nc-sa-2016-005
Sources
- CVE-2016-9462 · CVE Program
- CVE-2016-9462 · NVD
- FIRST EPSS
- GHSA-xfx5-6q2x-cp8j · GitHub Advisory Database · CC BY 4.0
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