# CVE-2024-22400: Open redirect in user_saml via RelayState parameter in Nextcloud User Saml

> Attackers can redirect users to malicious third-party servers via the RelayState parameter in the Nextcloud User Saml app.

- **Severity:** Low 3.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **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:** 17 Jun 2025
- **Also known as:** GHSA-622q-xhfr-xmv7

## What is CVE-2024-22400?

CVE-2024-22400 is a low-severity 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 User Saml is an app for authenticating Nextcloud users using SAML. In affected versions users can be given a link to the Nextcloud server and end up on a uncontrolled thirdparty server. It is recommended that the User Saml app is upgraded to version 5.1.5, 5.2.5, or 6.0.1. There are no known workarounds for this issue.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2024-22400?

It affects 1 product.


Products: Nextcloud Sso \& Saml Authentication.

## How do I fix CVE-2024-22400?

No fix has been published for CVE-2024-22400 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-22400 being exploited?

There is no known exploitation of CVE-2024-22400 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-22400 and fix it if it is affected.

What it is: CVE-2024-22400 is a low-severity 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-2024-22400 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-2024-22400/ (Markdown: https://insights.sbomify.com/CVE-2024-22400/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-22400
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-22400
- OSV: https://osv.dev/vulnerability/CVE-2024-22400

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-22400/
Summaries are generated and may contain mistakes; the official description above is the record.