CVE-2021-33609

Name: CVE-2021-33609
Creator: NVD / NIST
Published: 2021-10-13T11:15:07.133+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.92%

Last modified Jun 17, 2026

CVE-2021-33609 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.92%

55.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vaadin	Vaadin	>= 8.0.0, < 8.14.1

References

https://github.com/vaadin/framework/pull/12415Patch, Third Party Advisory
https://vaadin.com/security/cve-2021-33609Vendor Advisory
https://github.com/vaadin/framework/pull/12415Patch, Third Party Advisory
https://vaadin.com/security/cve-2021-33609Vendor Advisory

Timeline

Published: Oct 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33609?

How severe is CVE-2021-33609?

CVE-2021-33609 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33609?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33609?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST