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

Advisory record · `GHSA-qcc4-3rxf-gf4m`

- **Identifiers:** `GHSA-qcc4-3rxf-gf4m` · `CVE-2021-33605`
- **State:** Confirmed
- **Severity:** CVSS 4.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-754](https://cwe.mitre.org/data/definitions/754.html)
- **Tags:** [CWE-754](https://agentprime.io/advisories/tag/cwe-754.md)
- **Published:** 30 Aug 2021
- **Updated:** 8 Nov 2023
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 30 Aug 2021, 16:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `com.vaadin:vaadin-checkbox-flow` (Maven): affected `>=12.0.0, <14.6.8 || >=15.0.0, <20.0.6`; fixed in `14.6.8`, `20.0.6`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 4.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`, from CNA (Vaadin)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0066, the 52nd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 30 Aug 2021. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-qcc4-3rxf-gf4m](https://github.com/advisories/GHSA-qcc4-3rxf-gf4m)
- [OSV: GHSA-qcc4-3rxf-gf4m](https://osv.dev/vulnerability/GHSA-qcc4-3rxf-gf4m)
- <https://github.com/vaadin/flow-components/security/advisories/GHSA-qcc4-3rxf-gf4m>
- <https://nvd.nist.gov/vuln/detail/CVE-2021-33605>
- <https://github.com/vaadin/flow-components/pull/1903>
- <https://github.com/vaadin/flow-components/commit/1aa6bc94c763023bc3fc5849c2a1e8cab3bf6766>
- <https://github.com/vaadin/flow-components/commit/f136532a735f703f1144f19fee48c9009c659f03>
- <https://github.com/vaadin/flow-components>
- <https://vaadin.com/security/cve-2021-33605>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-qcc4-3rxf-gf4m>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-qcc4-3rxf-gf4m/>. Everything for agents: <https://agentprime.io/llms.txt>.