How severe is GHSA-qcc4-3rxf-gf4m?

GHSA-qcc4-3rxf-gf4m has a CVSS score of 4.3/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by GHSA-qcc4-3rxf-gf4m?

GHSA-qcc4-3rxf-gf4m affects the following packages: com.vaadin:vaadin-checkbox-flow (Maven), com.vaadin:vaadin-checkbox-flow (Maven). Ecosystems affected: Maven.

How do I fix GHSA-qcc4-3rxf-gf4m?

Update com.vaadin:vaadin-checkbox-flow to 14.6.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qcc4-3rxf-gf4m is resolved across your whole dependency graph.

How do I detect GHSA-qcc4-3rxf-gf4m in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.vaadin:vaadin-checkbox-flow, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-qcc4-3rxf-gf4m if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-qcc4-3rxf-gf4m actively exploited in the wild?

No public exploit code has been indexed for GHSA-qcc4-3rxf-gf4m yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-qcc4-3rxf-gf4m?

GHSA-qcc4-3rxf-gf4m has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 50th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-qcc4-3rxf-gf4m?

GHSA-qcc4-3rxf-gf4m is classified as CWE-754 (CWE-754). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-qcc4-3rxf-gf4m published, and has it been updated?

GHSA-qcc4-3rxf-gf4m was published on August 30, 2021 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

Unauthorized property update in CheckboxGroup component in Vaadin 12-14 and 15-20GHSA-qcc4-3rxf-gf4m

MEDIUMFix: vaadin/flow-components#1903

GHSA-qcc4-3rxf-gf4m is a medium-severity (CVSS 4.3) CWE-754 vulnerability in com.vaadin:vaadin-checkbox-flow. A fix is available for com.vaadin:vaadin-checkbox-flow — see the affected versions and patch details below.

Also known asCVE-2021-33605

Published

Aug 30, 2021

Updated

Nov 8, 2023

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs50th percentile — riskier than 50% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-qcc4-3rxf-gf4m by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

2 pkgs affected

☕com.vaadin:vaadin-checkbox-flow☕com.vaadin:vaadin-checkbox-flow

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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.

https://vaadin.com/security/cve-2021-33605

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`com.vaadin:vaadin-checkbox-flow`	≥ 12.0.0&&< 14.6.8	14.6.8`com.vaadin:vaadin-checkbox-flow:14.6.8`
☕Maven	`com.vaadin:vaadin-checkbox-flow`	≥ 15.0.0&&< 20.0.6	20.0.6`com.vaadin:vaadin-checkbox-flow:20.0.6`

Affected Products

1 product · 5 configurations

Application

vaadin-checkbox-flowvaadin

≥ 18.0.0 && < 20.0.5

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.vaadin:vaadin-checkbox-flow, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.vaadin:vaadin-checkbox-flow to 14.6.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qcc4-3rxf-gf4m is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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. - https://vaadin.com/security/cve-2021-33605

O3 Security · Impact-Aware SCA

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CVSS Score

4.3/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CWE Classification

CWE-754CWE-754

Weaponization

No known public exploit tooling found.

Timeline

Disclosed

Aug 30, 2021

Last updated

Nov 8, 2023

Identifiers

GHSA-qcc4-3rxf-gf4m

References

Advisorynvd.nist.gov Webgithub.com Webgithub.com Webgithub.com Webgithub.com Webvaadin.com Packagegithub.com

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs with CWE-754 are rated as high or higher (top: critical).

CVE-2026-77411CVE-2026-87012CVE-2026-75595CVE-2026-56812CVE-2026-55484CVE-2026-69185CVE-2026-73430CVE-2026-73429Browse all CWE-754

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedNov 8, 2023

Unauthorized property update in CheckboxGroup component in Vaadin 12-14 and 15-20GHSA-qcc4-3rxf-gf4m

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is GHSA-qcc4-3rxf-gf4m in your dependencies?