CVE-2020-36320: Vaadin

High severity, CVSS 7.5. EPSS: 2% chance of exploitation in the next 30 days.

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.

Affected products

• Vaadin Vaadin: from 7.0.0, before 7.7.22 (fixed in 7.7.22)

Published 2021-04-23. Last modified 2026-06-17.