# CVE-2017-5256: Cross-site scripting in ePMP

> Authenticated users can inject persistent XSS payloads into device name and description fields, potentially compromising other administrators.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 20 Dec 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-5c2c-3pcp-ghm8

## What is CVE-2017-5256?

CVE-2017-5256 is a medium-severity cross-site scripting vulnerability in Cambium Networks ePMP, published on 20 Dec 2017. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

In version 3.5 and prior of Cambium Networks ePMP firmware, all authenticated users have the ability to update the Device Name and System Description fields in the web administration console, and those fields are vulnerable to persistent cross-site scripting (XSS) injection.

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

## Which versions are affected by CVE-2017-5256?

It affects 2 products.


Products: Cambiumnetworks Epmp 1000 Firmware, Cambiumnetworks Epmp 2000 Firmware.

## How do I fix CVE-2017-5256?

No fix has been published for CVE-2017-5256 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-5256 being exploited?

There is no known exploitation of CVE-2017-5256 in the wild and no public exploit code.

## Other vulnerabilities in Cambium Networks ePMP

- [CVE-2017-5254](https://insights.sbomify.com/CVE-2017-5254/): Privilege escalation in ePMP (high 8.8)
- [CVE-2017-5255](https://insights.sbomify.com/CVE-2017-5255/): Command injection in ePMP (high 8.8)
- [CVE-2017-5257](https://insights.sbomify.com/CVE-2017-5257/): Cross-site scripting in ePMP (medium 5.4)
- [CVE-2017-5258](https://insights.sbomify.com/CVE-2017-5258/): Cross-site scripting in ePMP (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-5256 and fix it if it is affected.

What it is: CVE-2017-5256 is a medium-severity cross-site scripting vulnerability in Cambium Networks ePMP, published on 20 Dec 2017. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2017-5256 in the wild and no public exploit code.

Affected product: Cambium Networks ePMP. 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-2017-5256/ (Markdown: https://insights.sbomify.com/CVE-2017-5256/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-5256
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-5256
- OSV: https://osv.dev/vulnerability/CVE-2017-5256

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-5256/
Summaries are generated and may contain mistakes; the official description above is the record.