# CVE-2025-41346: Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este

> Attackers can impersonate users and compromise accounts by exploiting faulty authorization controls that rely on predictable numerical IDs.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Nov 2025
- **Updated:** 18 Feb 2026
- **Also known as:** GHSA-4486-rqpc-38g7

## What is CVE-2025-41346?

CVE-2025-41346 is a critical authentication bypass vulnerability in Informatica del Este WinPlus, published on 18 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Faulty authorization control in software WinPlus v24.11.27 by Informática del Este that allows another user to be impersonated simply by knowing their 'numerical ID', meaning that an attacker could compromise another user's account, thereby affecting the confidentiality, integrity, and availability of the data stored in the application.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2025-41346?

It affects 1 product.


Products: Iest Winplus.

## How do I fix CVE-2025-41346?

No fix has been published for CVE-2025-41346 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-41346 being exploited?

There is no known exploitation of CVE-2025-41346 in the wild and no public exploit code.

## Other vulnerabilities in Informatica del Este WinPlus

- [CVE-2025-41347](https://insights.sbomify.com/CVE-2025-41347/): Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este (high 8.7)
- [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-2025-41346 and fix it if it is affected.

What it is: CVE-2025-41346 is a critical authentication bypass vulnerability in Informatica del Este WinPlus, published on 18 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-41346 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-2025-41346/ (Markdown: https://insights.sbomify.com/CVE-2025-41346/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-41346
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-41346
- OSV: https://osv.dev/vulnerability/CVE-2025-41346

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-41346/
Summaries are generated and may contain mistakes; the official description above is the record.