CVEs-PoC/2021/CVE-2021-31409.md

### [CVE-2021-31409](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31409)
![](https://img.shields.io/static/v1?label=Product&message=Vaadin&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=vaadin-compatibility-server&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3E%3D%208.0.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-400%20Uncontrolled%20Resource%20Consumption&color=brighgreen)

### Description

Unsafe validation RegEx in EmailValidator component in com.vaadin:vaadin-compatibility-server versions 8.0.0 through 8.12.4 (Vaadin versions 8.0.0 through 8.12.4) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/Dzmitry-Basiachenka/dist-foreign-aliakh