# CVE-2015-5954: Missing authorization in n/a

> Authenticated users can bypass access restrictions to read files via sharing links when parent folders are deleted due to improper NULL handling in the virtual filesystem.

- **Severity:** Medium 4.0 (`AV:N/AC:L/Au:S/C:P/I:N/A:N`)
- **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:** 21 Oct 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-9hxw-x8cc-hmwq

## What is CVE-2015-5954?

CVE-2015-5954 is a medium-severity missing authorization vulnerability in Owncloud Owncloud, published on 21 Oct 2015. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The virtual filesystem in ownCloud Server before 6.0.9, 7.0.x before 7.0.7, and 8.0.x before 8.0.5 does not consider that NULL is a valid getPath return value, which allows remote authenticated users to bypass intended access restrictions and gain access to users files via a sharing link to a file with a deleted parent folder.

## Which versions are affected by CVE-2015-5954?

It affects 2 products.


Products: Owncloud Owncloud, Owncloud Owncloud Server.

## How do I fix CVE-2015-5954?

Upgrade to a fixed version.

## Is CVE-2015-5954 being exploited?

There is no known exploitation of CVE-2015-5954 in the wild and no public exploit code.

## Other vulnerabilities in Owncloud Owncloud

- [CVE-2021-35946](https://insights.sbomify.com/CVE-2021-35946/): Privilege escalation in n/a (critical 9.8)
- [CVE-2014-2052](https://insights.sbomify.com/CVE-2014-2052/): XML external entity in n/a (critical 9.8)
- [CVE-2014-2048](https://insights.sbomify.com/CVE-2014-2048/): Auth bypass in n/a (critical 9.8)
- [CVE-2020-28645](https://insights.sbomify.com/CVE-2020-28645/): Path traversal in n/a (critical 9.1)
- [CVE-2015-4718](https://insights.sbomify.com/CVE-2015-4718/): Command injection in n/a (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-5954 and fix it if it is affected.

What it is: CVE-2015-5954 is a medium-severity missing authorization vulnerability in Owncloud Owncloud, published on 21 Oct 2015. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2015-5954 in the wild and no public exploit code.

Affected product: Owncloud Owncloud. 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-2015-5954/ (Markdown: https://insights.sbomify.com/CVE-2015-5954/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-5954
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-5954
- OSV: https://osv.dev/vulnerability/CVE-2015-5954

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-5954/
Summaries are generated and may contain mistakes; the official description above is the record.