CVE-2025-66552

VendornextcloudProductnextcloud serverDiscoveredDec 5, 2025UpdatedDec 10, 2025

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 30.0.9 and 31.0.1, incorrect path handling with groupfolders caused the admin_audit app to not properly log all actions on files and folders inside groupfolders. This vulnerability is fixed in Nextcloud Server and Enterprise Server prior to 30.0.9 and 31.0.1.

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CVSS v3.1

4.3 MEDIUM

EPSS

0.33%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

EPSS Trend

Aug 16, 2026 → Nov 6, 2026

▲ 0.03pp

0.30% → 0.33% over 3 tracked changes

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

ScopeUNCHANGED

ConfidentialityNONE

IntegrityNONE

AvailabilityLOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Connections

2 relationships

nextcloud server

source

Timeline

disclosure → media coverage

Dec 5, 2025

Disclosure — published as a CVE record. · last revised by NVD Dec 10, 2025