CVE-2021-33605: Vaadin Vaadin-Checkbox-Flow

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

Improper check in CheckboxGroup in com.vaadin:vaadin-checkbox-flow versions 1.2.0 prior to 2.0.0 (Vaadin 12.0.0 prior to 14.0.0), 2.0.0 prior to 3.0.0 (Vaadin 14.0.0 prior to 14.5.0), 3.0.0 through 4.0.1 (Vaadin 15.0.0 through 17.0.11), 14.5.0 through 14.6.7 (Vaadin 14.5.0 through 14.6.7), and 18.0.0 through 20.0.5 (Vaadin 18.0.0 through 20.0.5) allows attackers to modify the value of a disabled Checkbox inside enabled CheckboxGroup component via unspecified vectors.

Affected products

• Vaadin Vaadin-Checkbox-Flow: from 1.2.0, before 2.0.0 (fixed in 2.0.0); from 2.0.0, before 3.0.0 (fixed in 3.0.0); from 3.0.0, before 4.0.1 (fixed in 4.0.1); from 14.5.0, before 14.6.7 (fixed in 14.6.7); from 18.0.0, before 20.0.5 (fixed in 20.0.5)

Published 2021-08-25. Last modified 2026-06-17.