# CVE-2025-0193: Stored Cross-site Scripting (XSS) Vulnerability in the MGate 5121/5122/5123 Series

> An authenticated admin can inject persistent scripts into the login message, allowing execution against other users accessing the device.

- **Severity:** Medium 5.2 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Jan 2025
- **Updated:** 15 Jan 2025
- **Also known as:** GHSA-m56g-xx45-238c

## What is CVE-2025-0193?

CVE-2025-0193 is a medium-severity cross-site scripting vulnerability in Moxa MGate 5121 Series, published on 15 Jan 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

A stored Cross-site Scripting (XSS) vulnerability exists in the MGate 5121/5122/5123 Series firmware version v1.0 because of insufficient sanitization and encoding of user input in the "Login Message" functionality. An authenticated attacker with administrative access can exploit this vulnerability to inject malicious scripts that are continuously stored on the device. These scripts are executed when other users access the login page, potentially resulting in unauthorized actions or other impacts, depending on the user's privileges.

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

## Which versions are affected by CVE-2025-0193?


## How do I fix CVE-2025-0193?

No fix has been published for CVE-2025-0193 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-0193 being exploited?

There is no known exploitation of CVE-2025-0193 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-0193 and fix it if it is affected.

What it is: CVE-2025-0193 is a medium-severity cross-site scripting vulnerability in Moxa MGate 5121 Series, published on 15 Jan 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-0193 in the wild and no public exploit code.

Affected product: Moxa MGate 5121 Series. 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-2025-0193/ (Markdown: https://insights.sbomify.com/CVE-2025-0193/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-0193
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-0193
- OSV: https://osv.dev/vulnerability/CVE-2025-0193

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-0193/
Summaries are generated and may contain mistakes; the official description above is the record.