CVE-2021-31409: Vaadin

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

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.

Affected products

• Vaadin Vaadin: from 8.0.0, up to and including 8.12.4

Published 2021-05-06. Last modified 2026-06-17.