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NVD / CVE Program· CNA Vaadin

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

MediumCVSS 4.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 17/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.66% (FIRST EPSS); higher than 52.2% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: com.vaadin:vaadin-checkbox-flow (Maven) 14.6.8, 20.0.6.

Low priority for now. Upgrade to com.vaadin:vaadin-checkbox-flow (Maven) 14.6.8, 20.0.6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Aug 25, 2021
Updated
Jun 16, 2026
EPSS
0.6% · 52th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CNA vs NVD score

NVD
4.3
CNA · Vaadin
4.3
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-33605

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
vaadinvaadin-checkbox-flow
vaadinvaadin

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Vaadin). Independent of NVD's CPE analysis and usually ahead of it.

  • Vaadin Vaadin

    • 12.0.0 and later · before unspecifiedaffected
    • unspecified and later · before 14.0.0affected
    • 14.0.0 and later · before unspecifiedaffected
    • unspecified and later · before 14.5.0affected
    • 15.0.0 and later · before unspecifiedaffected
    • unspecified and later · up to and including 17.0.11affected
    • 14.5.0 and later · before unspecifiedaffected
    • unspecified and later · up to and including 14.6.7affected
    • 18.0.0 and later · before unspecifiedaffected
    • unspecified and later · up to and including 20.0.5affected

  • Vaadin vaadin-checkbox-flow

    • 1.2.0 and later · before unspecifiedaffected
    • unspecified and later · before 2.0.0affected
    • 2.0.0 and later · before unspecifiedaffected
    • unspecified and later · before 3.0.0affected
    • 3.0.0 and later · before unspecifiedaffected
    • unspecified and later · up to and including 4.0.1affected
    • 14.5.0 and later · before unspecifiedaffected
    • unspecified and later · up to and including 14.6.7affected
    • 18.0.0 and later · before unspecifiedaffected
    • unspecified and later · up to and including 20.0.5affected
Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • vaadin vaadin-checkbox-flow1.2.0 and later · before 2.0.0
  • vaadin vaadin-checkbox-flow2.0.0 and later · before 3.0.0
  • vaadin vaadin-checkbox-flow3.0.0 and later · before 4.0.1
  • vaadin vaadin-checkbox-flow14.5.0 and later · before 14.6.7
  • vaadin vaadin-checkbox-flow18.0.0 and later · before 20.0.5

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavencom.vaadin:vaadin-checkbox-flowfrom 12.0.0 · before 14.6.814.6.8
Mavencom.vaadin:vaadin-checkbox-flowfrom 15.0.0 · before 20.0.620.0.6

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:com.vaadin:vaadin-checkbox-flow14.6.8Package registry (OSV)
Maven:com.vaadin:vaadin-checkbox-flow20.0.6Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-754 · Improper Check for Unusual or Exceptional Conditions

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records