MEDIUM
CVE-2016-9461
CWE-275Published: March 28, 2017· Updated: Jun 17, 2026
4.3
CVSS v3.1
Official 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.
Technical Analysis
CVE-2016-9461 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (18)
→
http://www.securityfocus.com/bid/97276Third Party Advisory · VDB Entry
→
https://github.com/nextcloud/server/commit/3491400261c1454a9a30d3ec96969573330120ccIssue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/0622e635d97cb17c5e1363e370bb8268cc3d2547Issue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/121a3304a0c37ccda0e1b63ddc528cba9121a36eIssue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/acbbadb71ceee7f01da347f7dcd519beda78cc47Issue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/c0a4b7b3f38ad2eaf506484b3b92ec678cb021c9Issue Tracking · Patch · Third Party Advisory
→
https://hackerone.com/reports/145950Exploit · Third Party Advisory
→
https://nextcloud.com/security/advisory/?id=nc-sa-2016-004Patch · Vendor Advisory
→
https://owncloud.org/security/advisory/?id=oc-sa-2016-014Patch · Vendor Advisory
→
http://www.securityfocus.com/bid/97276Third Party Advisory · VDB Entry
→
https://github.com/nextcloud/server/commit/3491400261c1454a9a30d3ec96969573330120ccIssue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/0622e635d97cb17c5e1363e370bb8268cc3d2547Issue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/121a3304a0c37ccda0e1b63ddc528cba9121a36eIssue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/acbbadb71ceee7f01da347f7dcd519beda78cc47Issue Tracking · Patch · Third Party Advisory
→
https://github.com/owncloud/core/commit/c0a4b7b3f38ad2eaf506484b3b92ec678cb021c9Issue Tracking · Patch · Third Party Advisory
Quick Facts
CVE IDCVE-2016-9461
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-275
CISA KEVNo
Affected2 vendor(s)
PublishedMar 28, 2017
Related CVEs (CWE-275)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2016-9461 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.