# CVE-2023-25579: Directory traversal in Nextcloud server

> Attackers can create paths outside their own space and overwrite other users' data via crafted paths in Nextcloud server.

- **Severity:** Medium 6.0 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Feb 2023
- **Updated:** 10 Mar 2025
- **Also known as:** GHSA-273v-9h7x-p68v

## What is CVE-2023-25579?

CVE-2023-25579 is a medium-severity path traversal vulnerability in Nextcloud Nextcloud Server, published on 22 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Nextcloud server is a self hosted home cloud product. In affected versions the `OC\Files\Node\Folder::getFullPath()` function was validating and normalizing the string in the wrong order. The function is used in the `newFile()` and `newFolder()` items, which may allow to creation of paths outside of ones own space and overwriting data from other users with crafted paths. This issue has been addressed in versions 25.0.2, 24.0.8, and 23.0.12. Users are advised to upgrade. There are no known workarounds for this issue.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2023-25579?

It affects 1 product.


Products: Nextcloud Nextcloud Server.

## How do I fix CVE-2023-25579?

Upgrade to a fixed version.

## Is CVE-2023-25579 being exploited?

There is no known exploitation of CVE-2023-25579 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-2023-25579 and fix it if it is affected.

What it is: CVE-2023-25579 is a medium-severity path traversal vulnerability in Nextcloud Nextcloud Server, published on 22 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-25579 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-2023-25579/ (Markdown: https://insights.sbomify.com/CVE-2023-25579/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-25579
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-25579
- OSV: https://osv.dev/vulnerability/CVE-2023-25579

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-25579/
Summaries are generated and may contain mistakes; the official description above is the record.