What’s Vulnerable › Vulnerabilities

CVE-2016-9462

• Severity: medium (CVSS 4.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-03-28 · updated 2026-06-17
• Weakness: CWE-275

Description

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.

Affected products

• Nextcloud Server: before 9.0.52 — fixed in 9.0.52
• Owncloud: before 9.0.4 — fixed in 9.0.4

How to fix

Upgrade to a fixed version: Nextcloud Server 9.0.52; Owncloud 9.0.4. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/97285
• https://github.com/nextcloud/server/commit/1208953ba1d4d55a18a639846bbcdd66a2d5bc5e
• https://github.com/owncloud/core/commit/23383080731d092e079986464a8c4c9ffcb79f4c
• https://github.com/owncloud/core/commit/3b056fa68ce502ceb0db9b446dab3b9e7b10dd13
• https://github.com/owncloud/core/commit/c93eca49c32428ece03dd67042772d5fa62c8d6e
• https://github.com/owncloud/core/commit/d31720b6f1e8c8dfeb5e8805ab35ad7c8000b2f1
• https://hackerone.com/reports/146067
• https://nextcloud.com/security/advisory/?id=nc-sa-2016-005
• https://owncloud.org/security/advisory/?id=oc-sa-2016-015
• http://www.securityfocus.com/bid/97285
• https://github.com/nextcloud/server/commit/1208953ba1d4d55a18a639846bbcdd66a2d5bc5e
• https://github.com/owncloud/core/commit/23383080731d092e079986464a8c4c9ffcb79f4c

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