CVE-2021-31405

mediumpriority · track · 30EPSS 0.011 · 66 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.13% (66th) EPSS

CVSS 5 · medium

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security@vaadin.comexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimaryCWE-400US

affected products (8)

Products and version ranges known to be affected.

Vaadin Vaadin14.0.6 → *enisa_euvdEU
Vaadin vaadin-text-field-flow2.0.4 → *enisa_euvdEU
vaadin flow2.0.4 → 2.3.3nvdUScpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
vaadin flow3.0.0 → 4.0.3nvdUScpe:2.3:a:vaadin:flow:*:*:*:*:*:*:*:*
vaadin vaadin14.0.6 → 14.4.4nvdUScpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
vaadin vaadin15.0.0 → 17.0.11nvdUScpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*
Maven com.vaadin:vaadin-bom14.0.6 → 14.4.4osvUSpkg:maven/com.vaadin/vaadin-bom
Maven com.vaadin:vaadin-bom15.0.0 → 17.0.11osvUSpkg:maven/com.vaadin/vaadin-bom

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-2wqp-jmcc-mc77Regular expression denial of service (ReDoS) in EmailField component in Vaadin 14 and 15-172021-04-19ghsa · osvUS
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. - https://vaadin.com/security/cve-2021-31405

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 2021-04-23modified 2026-06-17

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+9613 more

references (7)

External citations — patches, advisories, analysis.

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