# CVE-2016-6154: Cross-site scripting in n/a

> Reflected XSS in the authentication applet allows attackers to execute scripts or redirect users, potentially leading to session hijacking.

- **Severity:** Medium 6.1 (`CVSS:3.0/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:** 23 Aug 2019
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-mp33-hchw-9hvg

## What is CVE-2016-6154?

CVE-2016-6154 is a medium-severity cross-site scripting vulnerability in Watchguard Fireware, published on 23 Aug 2019. 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

The authentication applet in Watchguard Fireware 11.11 Operating System has reflected XSS (this can also cause an open redirect).

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2016-6154?

It affects 1 product.


Products: Watchguard Fireware.

## How do I fix CVE-2016-6154?

No fix has been published for CVE-2016-6154 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-6154 being exploited?

There is no known exploitation of CVE-2016-6154 in the wild and no public exploit code.

## Other vulnerabilities in Watchguard Fireware

- [CVE-2022-26318](https://insights.sbomify.com/CVE-2022-26318/): WatchGuard Firebox and XTM Appliances Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2025-14733](https://insights.sbomify.com/CVE-2025-14733/): WatchGuard Firebox Out of Bounds Write (critical 9.3, exploited in the wild)
- [CVE-2025-9242](https://insights.sbomify.com/CVE-2025-9242/): WatchGuard Firebox Out-of-Bounds Write (critical 9.3, exploited in the wild)
- [CVE-2022-23176](https://insights.sbomify.com/CVE-2022-23176/): WatchGuard Firebox and XTM Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2022-31789](https://insights.sbomify.com/CVE-2022-31789/): Integer overflow in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-6154 and fix it if it is affected.

What it is: CVE-2016-6154 is a medium-severity cross-site scripting vulnerability in Watchguard Fireware, published on 23 Aug 2019. 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-2016-6154 in the wild and no public exploit code.

Affected product: Watchguard Fireware. 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-2016-6154/ (Markdown: https://insights.sbomify.com/CVE-2016-6154/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-6154
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-6154
- OSV: https://osv.dev/vulnerability/CVE-2016-6154

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-6154/
Summaries are generated and may contain mistakes; the official description above is the record.