# CVE-2025-41347: Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este

> Attackers can upload malicious webshells via unrestricted file upload in WinPlus, leading to remote code execution.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Nov 2025
- **Updated:** 18 Feb 2026
- **Also known as:** GHSA-4xw5-95w2-c94q

## What is CVE-2025-41347?

CVE-2025-41347 is a high-severity vulnerability in Informatica del Este WinPlus, published on 18 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Unlimited upload vulnerability for dangerous file types in WinPlus v24.11.27 from Informática del Este. This vulnerability allows an attacker to upload a  'webshell' by sending a POST request to '/WinplusPortal/ws/sWinplus.svc/json/uploadfile'.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2025-41347?

It affects 1 product.


Products: Iest Winplus.

## How do I fix CVE-2025-41347?

No fix has been published for CVE-2025-41347 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-41347 being exploited?

There is no known exploitation of CVE-2025-41347 in the wild and no public exploit code.

## Other vulnerabilities in Informatica del Este WinPlus

- [CVE-2025-41346](https://insights.sbomify.com/CVE-2025-41346/): Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este (critical 9.3)
- [CVE-2025-41348](https://insights.sbomify.com/CVE-2025-41348/): Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este (high 8.7)
- [CVE-2025-41349](https://insights.sbomify.com/CVE-2025-41349/): Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este (medium 5.1)
- [CVE-2025-41350](https://insights.sbomify.com/CVE-2025-41350/): Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este (medium 5.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-41347 and fix it if it is affected.

What it is: CVE-2025-41347 is a high-severity vulnerability in Informatica del Este WinPlus, published on 18 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-41347 in the wild and no public exploit code.

Affected product: Informatica del Este WinPlus. 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-2025-41347/ (Markdown: https://insights.sbomify.com/CVE-2025-41347/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-41347
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-41347
- OSV: https://osv.dev/vulnerability/CVE-2025-41347

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-41347/
Summaries are generated and may contain mistakes; the official description above is the record.