---
cve: "CVE-2020-36320"
severity: "HIGH"
cvss: 7.5
epss: "2%"
vendor: "Vaadin"
kev: false
exploited: false
published: "2021-04-23 16:05:40"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:06:32+02:00"
---

# CVE-2020-36320

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Unsafe validation RegEx in EmailValidator class in com.vaadin:vaadin-server versions 7.0.0 through 7.7.21 (Vaadin 7.0.0 through 7.7.21) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 2e8b9d2b5b40652321aaa9d2bb2dba1041da7fc4 (Commit)

## Referenzen

- <https://vaadin.com/security/cve-2020-36320>
- <https://github.com/vaadin/framework/issues/7757>
- <https://github.com/vaadin/framework/pull/12104>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2020-36320) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_