CVE-2022-41968 Nextcloud Server's calendar name length not validated before writing to database

Low 3.5 Published 1 Dec 2022 Updated 23 Apr 2025

An attacker can cause denial of service by sending excessive data to the database due to missing validation on calendar name lengths.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2022-41968?

CVE-2022-41968 is a low-severity denial of service vulnerability in Nextcloud Nextcloud Server, published on 1 Dec 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Nextcloud Server is an open source personal cloud server. Prior to versions 23.0.10 and 24.0.5, calendar name lengths are not validated before writing to a database. As a result, an attacker can send unnecessary amounts of data against the database. Version 23.0.10 and 24.0.5 contain patches for the issue. No known workarounds are available.

Weakness: CWE-1284, CWE-400

Which versions are affected by CVE-2022-41968?

It affects 1 product.

Products include Nextcloud Nextcloud Server.

How do I fix CVE-2022-41968?

No fix has been published for CVE-2022-41968 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-41968 being exploited?

There is no known exploitation of CVE-2022-41968 in the wild and no public exploit code.

All Nextcloud Nextcloud Server vulnerabilities

Sources

Also known as GHSA-m92j-xxc8-hq3v.