# CVE-2018-18876: Path traversal in n/a

> Attackers can read arbitrary files on the underlying operating system via a directory traversal vulnerability in the readouts_rd.php script.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Jun 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-fx6p-gh9h-77j8

## What is CVE-2018-18876?

CVE-2018-18876 is a medium-severity path traversal vulnerability in n/a, published on 18 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In firmware version MS_2.6.9900 of Columbia Weather MicroServer, a readouts_rd.php directory traversal issue makes it possible to read any file present on the underlying operating system.

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

## Which versions are affected by CVE-2018-18876?

It affects 1 product.


Products: Columbiaweather Weather Microserver Firmware.

## How do I fix CVE-2018-18876?

No fix has been published for CVE-2018-18876 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-18876 being exploited?

There is no known exploitation of CVE-2018-18876 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-18877](https://insights.sbomify.com/CVE-2018-18877/): Missing authorization in n/a (high 8.8)
- [CVE-2018-18879](https://insights.sbomify.com/CVE-2018-18879/): Command injection in n/a (high 8.8)
- [CVE-2025-61939](https://insights.sbomify.com/CVE-2025-61939/): Columbia Weather Systems MicroServer Improper Restriction of Communication Channel to Intended Endpoints (high 8.7)
- [CVE-2025-66620](https://insights.sbomify.com/CVE-2025-66620/): Columbia Weather Systems MicroServer Command Shell in Externally Accessible Directory (high 8.6)
- [CVE-2018-18878](https://insights.sbomify.com/CVE-2018-18878/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-18876 and fix it if it is affected.

What it is: CVE-2018-18876 is a medium-severity path traversal vulnerability in n/a, published on 18 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-18876 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-2018-18876/ (Markdown: https://insights.sbomify.com/CVE-2018-18876/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-18876
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-18876
- OSV: https://osv.dev/vulnerability/CVE-2018-18876

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-18876/
Summaries are generated and may contain mistakes; the official description above is the record.