CVE-2025-66547

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Source
https://cve.org/CVERecord?id=CVE-2025-66547
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66547.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-66547
Aliases
Downstream
CGA (2)
Published
2025-12-05T16:32:17Z
Modified
2026-10-28T02:30:57Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Nextcloud Server users can modify tags on files that do not belong to them
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-639"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66547.json"
}
References

Affected packages

Git / github.com/nextcloud/server

Affected ranges

Type
GIT
Repo
https://github.com/nextcloud/server
Events
Introduced
051e46a7a272300cf7c90b3e330fd1501fd6a996
Fixed
ca86133382c6efb7c0eb82e5b9806a84bad2b9dc
Fixed
b44f1568f2dc97c746281d99e2342ad679e3d8a9
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
            "range":  [
                {
                    "introduced":  "31.0.0"
                },
                {
                    "fixed":  "31.0.1"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
            "range":  [
                {
                    "introduced":  "31.0.0"
                },
                {
                    "fixed":  "31.0.1"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "b44f1568f2dc97c746281d99e2342ad679e3d8a9"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v31.*
v31.0.0
v31.0.1rc1
v31.0.1rc2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66547.json"