Unauthorized property update in CheckboxGroup component in Vaadin 12-14 and 15-20

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.

See CWE-754: Improper Check for Unusual or Exceptional Conditions

Description

A Checkbox component, that is disabled from the server can have its server-side value changed from the client in certain situations. An unauthorized value change is only possible when the Checkbox is part of a CheckboxGroup. Independent Checkbox components are not susceptible to this behavior.

Affected products and mitigation

Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:

Please note that Vaadin versions 12-13 and 15-19 are no longer supported and you should update either to the latest 14 or 20 version respectively. 

Artifacts

Please note that starting with 14.5.0 (LTS) the versioning of web and Flow component artifacts were changed to align with platform releases. Version 14.6.8 of com.vaadin:vaadin-checkbox-flow artifact is a compatible upgrade for versions 2.0 through 2.2 (Vaadin 14.x) even though the major version has changed. 

References

• PR: https://github.com/vaadin/flow-components/pull/1903