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

High 8.7 Published 18 Nov 2025 Updated 18 Feb 2026

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

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

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

Which versions are affected by CVE-2025-41347?

It affects 1 product.

Products include 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.

Sources

Also known as GHSA-4xw5-95w2-c94q.