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4.3
MEDIUM CVSS 3.1
CVE-2025-66552
Nextcloud Server admin_audit does not log all actions on files in groupfolders
Description

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.

INFO

Published Date :

Dec. 5, 2025, 5:16 p.m.

Last Modified :

Dec. 10, 2025, 3:14 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-66552 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Nextcloud nextcloud_server
2 Nextcloud notes
: Total Affected Vendor : 1 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Update Nextcloud Server to a fixed version to resolve incorrect path handling and logging issues.
  • Update Nextcloud Server to version 30.0.9 or later.
  • Update Nextcloud Enterprise Server to version 31.0.1 or later.
  • Ensure groupfolders and admin_audit app are configured correctly.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-66552.

URL Resource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ww9m-f8j4-jj9x Patch Vendor Advisory
https://github.com/nextcloud/server/commit/7cc005c43c72bc384848cf8cb851895827c412f6 Patch
https://github.com/nextcloud/server/pull/50992 Issue Tracking
https://hackerone.com/reports/2890071 Issue Tracking Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-66552 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-66552 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-66552 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-66552 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Dec. 10, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
    Added CPE Configuration OR *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* versions from (including) 30.0.0 up to (excluding) 30.0.9 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 30.0.0 up to (excluding) 30.0.9 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:* versions from (including) 31.0.0 up to (excluding) 31.0.1 *cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:* versions from (including) 31.0.0 up to (excluding) 31.0.1
    Added Reference Type GitHub, Inc.: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ww9m-f8j4-jj9x Types: Patch, Vendor Advisory
    Added Reference Type GitHub, Inc.: https://github.com/nextcloud/server/commit/7cc005c43c72bc384848cf8cb851895827c412f6 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/nextcloud/server/pull/50992 Types: Issue Tracking
    Added Reference Type GitHub, Inc.: https://hackerone.com/reports/2890071 Types: Issue Tracking, Vendor Advisory
  • New CVE Received by [email protected]

    Dec. 05, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
    Added CWE CWE-778
    Added Reference https://github.com/nextcloud/security-advisories/security/advisories/GHSA-ww9m-f8j4-jj9x
    Added Reference https://github.com/nextcloud/server/commit/7cc005c43c72bc384848cf8cb851895827c412f6
    Added Reference https://github.com/nextcloud/server/pull/50992
    Added Reference https://hackerone.com/reports/2890071
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 4.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact