### [CVE-2019-25027](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-25027)
![](https://img.shields.io/static/v1?label=Product&message=Vaadin&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=flow-server&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3E%3D%201.0.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3E%3D%2010.0.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-81%20Improper%20Neutralization%20of%20Script%20in%20an%20Error%20Message%20Web%20Page&color=brighgreen)

### Description

Missing output sanitization in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.10 (Vaadin 10.0.0 through 10.0.13), and 1.1.0 through 1.4.2 (Vaadin 11.0.0 through 13.0.5) allows attacker to execute malicious JavaScript via crafted URL

### POC

#### Reference
- https://github.com/vaadin/flow/pull/5498

#### Github
No PoCs found on GitHub currently.