CVE-2021-31405

Name: CVE-2021-31405
Creator: NVD / NIST
Published: 2021-04-23T16:15:08.687+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.13%

Last modified Jun 17, 2026

CVE-2021-31405 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Unsafe validation RegEx in EmailField component in com.vaadin:vaadin-text-field-flow versions 2.0.4 through 2.3.2 (Vaadin 14.0.6 through 14.4.3), and 3.0.0 through 4.0.2 (Vaadin 15.0.0 through 17.0.10) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

Description

Unsafe validation RegEx in EmailField component in com.vaadin:vaadin-text-field-flow versions 2.0.4 through 2.3.2 (Vaadin 14.0.6 through 14.4.3), and 3.0.0 through 4.0.2 (Vaadin 15.0.0 through 17.0.10) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.13%

62.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vaadin	Flow	>= 2.0.4, < 2.3.3
Vaadin	Flow	>= 3.0.0, < 4.0.3
Vaadin	Vaadin	>= 14.0.6, < 14.4.4
Vaadin	Vaadin	>= 15.0.0, < 17.0.11

References

https://github.com/vaadin/flow-components/pull/442Patch, Third Party Advisory
https://vaadin.com/security/cve-2021-31405Vendor Advisory
https://github.com/vaadin/flow-components/pull/442Patch, Third Party Advisory
https://vaadin.com/security/cve-2021-31405Vendor Advisory

Timeline

Published: Apr 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31405?

How severe is CVE-2021-31405?

CVE-2021-31405 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31405?

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-2021-31405?

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

Scan your code now

Source: NVD / NIST