What is CVE-2025-66552?

CVE-2025-66552 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under CWE-778. CVSS score: 4.3/10. Published 2025-12-05.

How severe is CVE-2025-66552?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Nextcloud Security-advisories

CVE-2025-66552

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 an…

EPSS: 0.000 (9.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Nextcloud Security-advisories — versions >= 32.0.0beta1, < 32.0.1, < 31.0.9

Weakness classification (CWE)

CWE-778

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ww9m-f8j4-jj9x (x_refsource_CONFIRM)
https://github.com/nextcloud/server/pull/50992 (x_refsource_MISC)
https://github.com/nextcloud/server/commit/7cc005c43c72bc384848cf8cb851895827c412f6 (x_refsource_MISC)
https://hackerone.com/reports/2890071 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-66552?: CVE-2025-66552 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under CWE-778. CVSS score: 4.3/10. Published 2025-12-05.
How severe is CVE-2025-66552?: Medium severity. CVSS v3 base score is 4.3 out of 10.