HOMEVULNERABILITIESCVE-2021-33605
MEDIUM

CVE-2021-33605

CWE-754Published: August 25, 2021· Updated: Jun 17, 2026

4.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-33605 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected Vendors & Products

vaadin2 product(s)
vaadin-checkbox-flowvaadin
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (4)

→
https://github.com/vaadin/flow-components/pull/1903Patch · Third Party Advisory
→
https://vaadin.com/security/cve-2021-33605Vendor Advisory
→
https://github.com/vaadin/flow-components/pull/1903Patch · Third Party Advisory
→
https://vaadin.com/security/cve-2021-33605Vendor Advisory

Quick Facts

CVE IDCVE-2021-33605
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-754
CISA KEVNo
Affected1 vendor(s)
PublishedAug 25, 2021

Related CVEs (CWE-754)

CVE-2021-0211
10.0
CVE-2025-13392
9.8
CVE-2022-45788
9.8
CVE-2020-10571
9.8
CVE-2020-28037
9.8
CVE-2020-8986
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-33605 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2021-33605·NVD