# CVE-2020-5606: Cross-site scripting in WHR-G54S

> Remote attackers can inject arbitrary scripts into Buffalo WHR-G54S routers via crafted pages, potentially compromising user sessions.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Sep 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f98v-r833-rqxp

## What is CVE-2020-5606?

CVE-2020-5606 is a medium-severity cross-site scripting vulnerability in BUFFALO INC. WHR-G54S, published on 18 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Cross-site scripting vulnerability in WHR-G54S firmware 1.43 and earlier allows remote attackers to inject arbitrary script via a specially crafted page.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2020-5606?

It affects 1 product.


Products: Buffalo Airstation Whr-G54s Firmware.

## How do I fix CVE-2020-5606?

No fix has been published for CVE-2020-5606 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5606 being exploited?

There is no known exploitation of CVE-2020-5606 in the wild and no public exploit code.

## Other vulnerabilities in BUFFALO INC. WHR-G54S

- [CVE-2020-5605](https://insights.sbomify.com/CVE-2020-5605/): Path traversal in WHR-G54S (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5606 and fix it if it is affected.

What it is: CVE-2020-5606 is a medium-severity cross-site scripting vulnerability in BUFFALO INC. WHR-G54S, published on 18 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-5606 in the wild and no public exploit code.

Affected product: BUFFALO INC. WHR-G54S. 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-2020-5606/ (Markdown: https://insights.sbomify.com/CVE-2020-5606/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5606
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5606
- OSV: https://osv.dev/vulnerability/CVE-2020-5606

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5606/
Summaries are generated and may contain mistakes; the official description above is the record.