CVE-2025-66547

MEDIUM EPSS 14.7%
Published Dec 5, 20256mo ago · Modified Jun 17, 20261w ago
4.3 CVSS 3.1
Medium
Find Similar
Published Dec 5, 2025 6mo ago
Last Modified Jun 17, 2026 1w ago

Description

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 31.0.1, non-privileged users can modify tags on files they should not have access to via bulk tagging. This vulnerability is fixed in 31.0.1.

CVSS Details

Base Score
4.3
Exploitability
2.8
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
14.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-639

Affected Products 2

VendorProductVersionRange
nextcloudnextcloud_server*≥31.0.0  –  <31.0.1
nextcloudnextcloud_server*≥31.0.0  –  <31.0.1

References 5

  • github.com https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2
    PatchVendor Advisory
  • github.com https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9
    Patch
  • github.com https://github.com/nextcloud/server/issues/51247
    Issue Tracking
  • github.com https://github.com/nextcloud/server/pull/51288
    Issue Tracking
  • hackerone.com https://hackerone.com/reports/3040887
    Permissions RequiredVendor Advisory

Remediation

  • github.com https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2
    PatchVendor Advisory
  • github.com https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9
    Patch