CVE-2022-31120 Federated share accepting/declining is not logged in audit log in Nextcloud Server

Low 2.1 Published 4 Aug 2022 Updated 23 Apr 2025

Missing audit logs for federated share actions allow attackers to perform brute force attacks without detection, undermining security monitoring.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2022-31120?

CVE-2022-31120 is a low-severity vulnerability in Nextcloud Nextcloud Server, published on 4 Aug 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Nextcloud server is an open source personal cloud solution. The audit log is used to get a full trail of the actions which has been incompletely populated. In affected versions federated share events were not properly logged which would allow brute force attacks to go unnoticed. This behavior exacerbates the impact of CVE-2022-31118. It is recommended that the Nextcloud Server is upgraded to 22.2.7, 23.0.4 or 24.0.0. There are no workarounds available.

Weakness: CWE-778

Which versions are affected by CVE-2022-31120?

It affects 1 product.

Products include Nextcloud Nextcloud Server.

How do I fix CVE-2022-31120?

No fix has been published for CVE-2022-31120 yet. Limit exposure of the affected software until one is available.

Is CVE-2022-31120 being exploited?

There is no known exploitation of CVE-2022-31120 in the wild and no public exploit code.

All Nextcloud Nextcloud Server vulnerabilities

Sources

Also known as GHSA-9qvg-7fwg-722x.