# CVE-2025-47794: Nextcloud Server vulnerable to insecure temporary file creation, race with write access and permission

> An attacker on a multi-user system can read temporary files or perform symlink attacks due to insecure file creation, leading to data exposure or privilege escalation.

- **Severity:** Low 2.6 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/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:** 16 May 2025
- **Updated:** 16 May 2025
- **Also known as:** GHSA-q568-2933-gcjq

## What is CVE-2025-47794?

CVE-2025-47794 is a low-severity vulnerability in Nextcloud Nextcloud Server, published on 16 May 2025. 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. In Nextcloud Server prior to 29.0.13, 30.0.7, and 31.0.1 and Nextcloud Enterprise Server prior to 26.0.13.13, 27.1.11.13, 28.0.14.4, 29.0.13, 30.0.7, and 31.0.1, an attacker on a multi-user system may read temporary files from Nextcloud running with a different user account, or run a symlink attack. Nextcloud Server versions 29.0.13, 30.0.7, and 31.0.1 and Nextcloud Enterprise Server 26.0.13.13, 27.1.11.13, 28.0.14.4, 29.0.13, 30.0.7, and 31.0.1 fix the issue. No known workarounds are available.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2025-47794?

It affects 1 product.


Products: Nextcloud Nextcloud Server.

## How do I fix CVE-2025-47794?

No fix has been published for CVE-2025-47794 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-47794 being exploited?

There is no known exploitation of CVE-2025-47794 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-2025-47794 and fix it if it is affected.

What it is: CVE-2025-47794 is a low-severity vulnerability in Nextcloud Nextcloud Server, published on 16 May 2025. 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-2025-47794 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-2025-47794/ (Markdown: https://insights.sbomify.com/CVE-2025-47794/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-47794
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-47794
- OSV: https://osv.dev/vulnerability/CVE-2025-47794

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-47794/
Summaries are generated and may contain mistakes; the official description above is the record.