# CVE-2018-9148: Auth bypass in n/a

> Attackers can bypass authentication on WD My Cloud devices by listing directories to retrieve session tokens embedded in filenames.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Mar 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-hrr3-c733-fj52

## What is CVE-2018-9148?

CVE-2018-9148 is a critical authentication bypass vulnerability in n/a, published on 30 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Western Digital WD My Cloud v04.05.00-320 devices embed the session token (aka PHPSESSID) in filenames, which makes it easier for attackers to bypass authentication by listing a directory. NOTE: this can be exploited in conjunction with CVE-2018-7171 for remote authentication bypass within a product that uses My Cloud.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2018-9148?

It affects 1 product.


Products: Westerndigital My Cloud Firmware.

## How do I fix CVE-2018-9148?

No fix has been published for CVE-2018-9148 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-9148 being exploited?

There is no known exploitation of CVE-2018-9148 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-27744](https://insights.sbomify.com/CVE-2020-27744/): Command injection in n/a (critical 9.8)
- [CVE-2020-12830](https://insights.sbomify.com/CVE-2020-12830/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-25765](https://insights.sbomify.com/CVE-2020-25765/): Command injection in n/a (critical 9.8)
- [CVE-2020-27158](https://insights.sbomify.com/CVE-2020-27158/): Command injection in n/a (critical 9.8)
- [CVE-2020-27159](https://insights.sbomify.com/CVE-2020-27159/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-9148 and fix it if it is affected.

What it is: CVE-2018-9148 is a critical authentication bypass vulnerability in n/a, published on 30 Mar 2018. 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-2018-9148 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-2018-9148/ (Markdown: https://insights.sbomify.com/CVE-2018-9148/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-9148
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-9148
- OSV: https://osv.dev/vulnerability/CVE-2018-9148

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-9148/
Summaries are generated and may contain mistakes; the official description above is the record.