CVE-2022-39211 Server-Side Request Forgery (SSRF) via potential filter bypass in Nextcloud Server

Low 3.0 Published 16 Sep 2022 Updated 23 Apr 2025

Attackers can bypass filters to request locally running webservices, potentially accessing internal resources in Nextcloud Server.

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-2022-39211?

CVE-2022-39211 is a low-severity server-side request forgery vulnerability in Nextcloud Nextcloud Server, published on 16 Sep 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 platform. In affected versions it was found that locally running webservices can be found and requested erroneously. It is recommended that the Nextcloud Server is upgraded to 23.0.8 or 24.0.4. It is recommended that the Nextcloud Enterprise Server is upgraded to 22.2.10.4, 23.0.8 or 24.0.4. There are no known workarounds for this issue.

Weakness: CWE-918

Which versions are affected by CVE-2022-39211?

It affects 2 products.

Products include Nextcloud Nextcloud Enterprise Server, Nextcloud Nextcloud Server.

How do I fix CVE-2022-39211?

No fix has been published for CVE-2022-39211 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2022-39211 being exploited?

There is no known exploitation of CVE-2022-39211 in the wild and no public exploit code.

All Nextcloud Nextcloud Server vulnerabilities

Sources

Also known as GHSA-rmf9-w497-8cq8.