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CVE-2025-66552

19
FAUCET Score

CVE-2025-66552 is a medium-severity vulnerability affecting Nextcloud Server and Enterprise Server versions prior to 30.0.9 and 31.0.1. It stems from incorrect path handling within the groupfolders feature, leading to the admin_audit app failing to properly log all actions on files and folders within groupfolders. This could result in a lack of accountability for administrative actions. The vulnerability has a CVSS score of 4.3 (MEDIUM), indicating a network attack vector with low attack complexity, requiring low privileges, and resulting in a low impact on integrity (I:L) but no impact on confidentiality or availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 30.0.0, < 30.0.9CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*
>= 30.0.0, < 30.0.9CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
>= 31.0.0, < 31.0.1CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*
>= 31.0.0, < 31.0.1CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.27%
Probability of exploitation in next 30 days
EPSS Percentile
19.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0027 is in the 24th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / nextcloud/security-advisories/security/advisories/GHSA-ww9m-f8j4-jj9x
PatchVendor Advisory
github.com / nextcloud/server/commit/7cc005c43c72bc384848cf8cb851895827c412f6
Patch
github.com / nextcloud/server/pull/50992
Issue Tracking
hackerone.com / reports/2890071
Issue TrackingVendor Advisory