CVE-2021-33605: Unauthorized property update in CheckboxGroup component in Vaadin 12-14 and 15-20

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-25 · updated 2026-06-17
Weakness: CWE-754

Description

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-checkbox-flow: from 1.2.0 before 2.0.0; from 2.0.0 before 3.0.0; from 3.0.0 before 4.0.1; from 14.5.0 before 14.6.7; from 18.0.0 before 20.0.5 — fixed in 14.6.7, 2.0.0, 20.0.5, 3.0.0, 4.0.1

How to fix

Upgrade to a fixed version: vaadin-checkbox-flow 14.6.7, 2.0.0, 20.0.5, 3.0.0. Check the vendor advisory for mitigations.

References

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