# CVE-2024-22212: Nextcloud global site selector authentication bypass

> An authentication bypass in Nextcloud Global Site Selector allows attackers to log in as other users, requiring an upgrade to secure the system.

- **Severity:** Critical 9.7 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Jan 2024
- **Updated:** 11 Sep 2024
- **Also known as:** GHSA-vj5q-f63m-wp77

## What is CVE-2024-22212?

CVE-2024-22212 is a critical authentication bypass vulnerability in nextcloud security-advisories, published on 18 Jan 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Nextcloud Global Site Selector is a tool which allows you to run multiple small Nextcloud instances and redirect users to the right server. A problem in the password verification method allows an attacker to authenticate as another user. It is recommended that the Nextcloud Global Site Selector is upgraded to version 1.4.1, 2.1.2, 2.3.4 or 2.4.5. There are no known workarounds for this issue.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2024-22212?

It affects 1 product.


Products: Nextcloud Global Site Selector.

## How do I fix CVE-2024-22212?

No fix has been published for CVE-2024-22212 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-22212 being exploited?

There is no known exploitation of CVE-2024-22212 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-22212 and fix it if it is affected.

What it is: CVE-2024-22212 is a critical authentication bypass vulnerability in nextcloud security-advisories, published on 18 Jan 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-22212 in the wild and no public exploit code.

Affected product: nextcloud security-advisories. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-22212/ (Markdown: https://insights.sbomify.com/CVE-2024-22212/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-22212
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-22212
- OSV: https://osv.dev/vulnerability/CVE-2024-22212

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-22212/
Summaries are generated and may contain mistakes; the official description above is the record.