CVE-2021-33609

mediumpriority · track · 17EPSS 0.009 · 61 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.95% (61st) EPSS

CVSS 4 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

Missing check in DataCommunicator class in com.vaadin:vaadin-server versions 8.0.0 through 8.14.0 (Vaadin 8.0.0 through 8.14.0) allows authenticated network attacker to cause heap exhaustion by requesting too many rows of data.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · security@vaadin.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · OSV

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20USCWE-400USCWE-400US

affected products (6)

Products and version ranges known to be affected.

Vaadin Vaadin≤ unspecified ≤8.14.0enisa_euvdEU
Vaadin Vaadin8.0.0 → unspecifiedenisa_euvdEU
Vaadin vaadin-server≤ unspecified ≤8.14.0enisa_euvdEU
Vaadin vaadin-server8.0.0 → unspecifiedenisa_euvdEU
vaadin vaadin8.0.0 → 8.14.1nvdUScpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
Maven com.vaadin:vaadin-server8.0.6 → 8.14.1osvUSpkg:maven/com.vaadin/vaadin-server

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-qcgx-crrx-38v5Denial of service in DataCommunicator class in Vaadin 82021-10-13ghsa · osvUS
Missing check in `DataCommunicator` class in `com.vaadin:vaadin-server` versions 8.0.0 through 8.14.0 (Vaadin 8.0.0 through 8.14.0) allows authenticated network attacker to cause heap exhaustion by requesting too many rows of data.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2021-10-13modified 2026-06-17

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+25171 more

references (7)

External citations — patches, advisories, analysis.

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