# CVE-2024-52514: Nextcloud Server allows users to copy folder that contain files that are blocked by the files access control

> Attackers can bypass file access controls by copying folders containing blocked files, potentially gaining unauthorized access to restricted data.

- **Severity:** Medium 4.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N`)
- **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 available:** No
- **Published:** 15 Nov 2024
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-g8pr-g25r-58xj

## What is CVE-2024-52514?

CVE-2024-52514 is a medium-severity missing authorization vulnerability in Nextcloud Nextcloud Server, published on 15 Nov 2024. 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 a self hosted personal cloud system. After a user received a share with some files inside being blocked by the files access control, the user would still be able to copy the intermediate folder inside Nextcloud allowing them to afterwards potentially access the blocked files depending on the user access control rules. It is recommended that the Nextcloud Server is upgraded to 27.1.9, 28.0.5 or 29.0.0 and Nextcloud Enterprise Server is upgraded to 21.0.9.18, 22.2.10.23, 23.0.12.18, 24.0.12.14, 25.0.13.9, 26.0.13.3, 27.1.9, 28.0.5 or 29.0.0.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2024-52514?

It affects 1 product.


Products: Nextcloud Nextcloud Server.

## How do I fix CVE-2024-52514?

No fix has been published for CVE-2024-52514 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-52514 being exploited?

There is no known exploitation of CVE-2024-52514 in the wild and no public exploit code.

## Other vulnerabilities in Nextcloud Nextcloud Server

- [CVE-2021-32802](https://insights.sbomify.com/CVE-2021-32802/): Preview generation used third-party library not suited for user-generated content in Nextcloud server (critical 9.3)
- [CVE-2023-26482](https://insights.sbomify.com/CVE-2023-26482/): Scope of workflow operations is not validated in nextcloud server (critical 9.1)
- [CVE-2018-3775](https://insights.sbomify.com/CVE-2018-3775/): Auth bypass in Nextcloud Server (high 8.8)
- [CVE-2023-35172](https://insights.sbomify.com/CVE-2023-35172/): Nextcloud Server password reset endpoint is not brute force protected (high 8.7)
- [CVE-2023-32320](https://insights.sbomify.com/CVE-2023-32320/): Nextcloud Server's brute force protection allows someone to send more requests than intended (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-52514 and fix it if it is affected.

What it is: CVE-2024-52514 is a medium-severity missing authorization vulnerability in Nextcloud Nextcloud Server, published on 15 Nov 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-52514 in the wild and no public exploit code.

Affected product: Nextcloud Nextcloud Server. 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-2024-52514/ (Markdown: https://insights.sbomify.com/CVE-2024-52514/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-52514
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-52514
- OSV: https://osv.dev/vulnerability/CVE-2024-52514

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-52514/
Summaries are generated and may contain mistakes; the official description above is the record.