# CVE-2019-25356: Bematech Printer MP-4200 TH Cross-Site Scripting

> Attackers can inject malicious scripts into the admin page of Bematech MP-4200 TH printers, potentially hijacking authenticated user sessions.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 Feb 2026
- **Updated:** 26 May 2026
- **Also known as:** GHSA-ffp3-q8wm-h894

## What is CVE-2019-25356?

CVE-2019-25356 is a medium-severity cross-site scripting vulnerability in Bematech MP-4200 TH, published on 18 Feb 2026. 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

Bematech (formerly Logic Controls, now Elgin) MP-4200 TH printer contains a cross-site scripting vulnerability in the admin configuration page. Attackers can inject malicious scripts via crafted POST requests with malformed 'admin' and 'person' parameters, allowing execution of arbitrary JavaScript in the context of an authenticated user's browser session.

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

## Which versions are affected by CVE-2019-25356?


## How do I fix CVE-2019-25356?

No fix has been published for CVE-2019-25356 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-25356 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25356 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25356 and fix it if it is affected.

What it is: CVE-2019-25356 is a medium-severity cross-site scripting vulnerability in Bematech MP-4200 TH, published on 18 Feb 2026. An attacker can exploit it over the internet without logging in, 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-2019-25356 exists.

Affected product: Bematech MP-4200 TH. 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-2019-25356/ (Markdown: https://insights.sbomify.com/CVE-2019-25356/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25356
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25356
- OSV: https://osv.dev/vulnerability/CVE-2019-25356

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-25356/
Summaries are generated and may contain mistakes; the official description above is the record.