# CVE-2018-13355: Missing authorization in n/a

> Attackers can create user groups without authorization due to incorrect access controls in the TerraMaster TOS web interface.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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:** No
- **Published:** 27 Nov 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-f8q7-3p38-7rvj

## What is CVE-2018-13355?

CVE-2018-13355 is a medium-severity missing authorization vulnerability in n/a, published on 27 Nov 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Incorrect access controls in ajaxdata.php in TerraMaster TOS version 3.1.03 allow attackers to create user groups without proper authorization.

Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2018-13355?

It affects 1 product.


Products: Terra-Master Terramaster Operating System.

## How do I fix CVE-2018-13355?

No fix has been published for CVE-2018-13355 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-13355 being exploited?

There is no known exploitation of CVE-2018-13355 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-24990](https://insights.sbomify.com/CVE-2022-24990/): TerraMaster OS Remote Command Execution (critical 9.8, exploited in the wild)
- [CVE-2022-24989](https://insights.sbomify.com/CVE-2022-24989/): Command injection in n/a (critical 9.8)
- [CVE-2020-35665](https://insights.sbomify.com/CVE-2020-35665/): Command injection in n/a (critical 9.8)
- [CVE-2018-13336](https://insights.sbomify.com/CVE-2018-13336/): Command injection in n/a (critical 9.8)
- [CVE-2018-13338](https://insights.sbomify.com/CVE-2018-13338/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-13355 and fix it if it is affected.

What it is: CVE-2018-13355 is a medium-severity missing authorization vulnerability in n/a, published on 27 Nov 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-13355 in the wild and no public exploit code.

Affected product: n/a. 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-2018-13355/ (Markdown: https://insights.sbomify.com/CVE-2018-13355/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-13355
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-13355
- OSV: https://osv.dev/vulnerability/CVE-2018-13355

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-13355/
Summaries are generated and may contain mistakes; the official description above is the record.