# CVE-2024-52512: Nextcloud User OIDC has an open redirection when logging in with User OIDC

> A malicious user can craft a login link that redirects victims to an arbitrary URL after authentication, potentially facilitating phishing attacks.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Nov 2024
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-784j-x2g5-4g7q

## What is CVE-2024-52512?

CVE-2024-52512 is a low-severity vulnerability in nextcloud security-advisories, published on 15 Nov 2024. 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

user_oidc app is an OpenID Connect user backend for Nextcloud. A malicious user could send a malformed login link that would redirect the user to a provided URL after successfully authenticating. It is recommended that the Nextcloud User OIDC app is upgraded to 6.1.0.

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

## Which versions are affected by CVE-2024-52512?

It affects 1 product.


Products: Nextcloud User Oidc.

## How do I fix CVE-2024-52512?

No fix has been published for CVE-2024-52512 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-52512 being exploited?

There is no known exploitation of CVE-2024-52512 in the wild and no public exploit code.

## Other vulnerabilities in nextcloud security-advisories

- [CVE-2023-32074](https://insights.sbomify.com/CVE-2023-32074/): Nextcloud user_oidc app is missing brute force protection (high 8.0)
- [CVE-2024-37312](https://insights.sbomify.com/CVE-2024-37312/): Nextcloud user_oidc app's ID4me feature is available even when disabled (medium 6.3)
- [CVE-2024-37886](https://insights.sbomify.com/CVE-2024-37886/): Nextcloud user_oidc's ID4me does not validate signature or expiration (medium 5.4)
- [CVE-2023-39953](https://insights.sbomify.com/CVE-2023-39953/): Issuer not verified from obtained token in user_oidc (medium 4.8)
- [CVE-2023-28848](https://insights.sbomify.com/CVE-2023-28848/): CSRF protection on user_oidc login returned the expected token in case of an error (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-52512 and fix it if it is affected.

What it is: CVE-2024-52512 is a low-severity vulnerability in nextcloud security-advisories, published on 15 Nov 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-52512 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-2024-52512/ (Markdown: https://insights.sbomify.com/CVE-2024-52512/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-52512
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-52512
- OSV: https://osv.dev/vulnerability/CVE-2024-52512

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-52512/
Summaries are generated and may contain mistakes; the official description above is the record.