CVE-2025-66552

low-risk
Published 2025-12-05

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.

Do I need to act?

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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Nextcloud

References (4)

Patch https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ww9m-f...
Patch https://github.com/nextcloud/server/commit/7cc005c43c72bc384848cf8cb851895827c41...
Issue Tracking https://github.com/nextcloud/server/pull/50992
Issue Tracking https://hackerone.com/reports/2890071
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low