Resource exhaustion in Nextcloud Group Folders
CVE-2025-47793
Nextcloud Server is a self hosted personal cloud system, and the Nextcloud Groupfolders app provides admin-configured folders shared by everyone in a group or team. In Nextcloud Server prior to 30.0.2, 29.0.9, and 28.0.1, Nextcloud Enterprise Server prior to 30.0.2 and 29.0.9, and Nextcloud Groupfolders app prior to 18.0.3, 17.0.5, and 16.0.11, the absence of quota checking on attachments allowed logged-in users to upload files exceeding the group folder quota. Nextcloud Server versions 30.0.2 and 29.0.9, Nextcloud Enterprise Server versions 30.0.2, 29.0.9, or 28.0.12, and Nextcloud Groupfolders app 18.0.3, 17.0.5, and 16.0.11 fix the issue. No known workarounds are available.
Published · last modified .
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:L/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000
Affected products
- Nextcloud Group Folders
- Nextcloud Server
- Nextcloud Security-Advisories — versions >= 30.0.0, < 30.0.2, >= 29.0.0, < 29.0.9, >= 28.0.0, < 28.0.12
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-qqgg-hhfq-vhww (Third Party Advisory)
- github.com/nextcloud/groupfolders/pull/3328 (Patch)
- github.com/nextcloud/server/pull/48623 (Patch)
- hackerone.com/reports/2713272 (Permissions Required)
Frequently asked questions
- What is CVE-2025-47793?
- CVE-2025-47793 is a medium-severity vulnerability in Nextcloud Group Folders, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2025-05-16.
- How severe is CVE-2025-47793?
- Medium severity. CVSS v3 base score is 4.3 out of 10.