CVE-2025-47793 Nextcloud Server and Groupfolders app vulnerable to bypass of group folder quota limit using attachment in text file
Logged-in users can bypass group folder quota limits by uploading attachments in text files, allowing unauthorized storage consumption.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-47793?
CVE-2025-47793 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 16 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-770
Which versions are affected by CVE-2025-47793?
It affects 2 products.
Products include Nextcloud Group Folders, Nextcloud Nextcloud Server.
How do I fix CVE-2025-47793?
No fix has been published for CVE-2025-47793 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-47793 being exploited?
There is no known exploitation of CVE-2025-47793 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Nextcloud Server
Sources
Also known as GHSA-qqgg-hhfq-vhww.