# CVE-2018-25131: Leica Geosystems GR10/GR25/GR30/GR50 GNSS 4.30.063 Stored XSS via Config Upload

> Attackers can upload malicious HTML files to Leica GNSS devices, executing arbitrary JavaScript in users' browsers via stored XSS.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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:** 24 Dec 2025
- **Updated:** 24 Dec 2025
- **Also known as:** GHSA-x4fw-5929-5227

## What is CVE-2018-25131?

CVE-2018-25131 is a medium-severity cross-site scripting vulnerability in Leica Geosystems AG GR10/GR25/GR30/GR50 GNSS, published on 24 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Leica Geosystems GR10/GR25/GR30/GR50 GNSS 4.30.063 contains a stored cross-site scripting vulnerability in the configuration file upload functionality. Attackers can upload a malicious HTML file to that executes arbitrary JavaScript in a user's browser session when viewed.

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

## Which versions are affected by CVE-2018-25131?


## How do I fix CVE-2018-25131?

No fix has been published for CVE-2018-25131 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-25131 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25131 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-25131 and fix it if it is affected.

What it is: CVE-2018-25131 is a medium-severity cross-site scripting vulnerability in Leica Geosystems AG GR10/GR25/GR30/GR50 GNSS, published on 24 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25131 exists.

Affected product: Leica Geosystems AG GR10/GR25/GR30/GR50 GNSS. 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-2018-25131/ (Markdown: https://insights.sbomify.com/CVE-2018-25131/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-25131
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-25131
- OSV: https://osv.dev/vulnerability/CVE-2018-25131

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-25131/
Summaries are generated and may contain mistakes; the official description above is the record.