CVE-2021-31405

Regular expression denial of service (ReDoS) in EmailField component in Vaadin 14 and 15-17

HIGH

7.5

CVSS Score

Published: April 23, 2021 at 04:05 PM UTC

Updated: June 17, 2026 at 03:51 AM UTC

3 products affected across 1 vendorVaadinFlowVaadin Text Field Flow

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Severity

HIGH7.5

Exploit prediction

EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Flow · Vaadinmaven

95%

2.0.4 ≤ v < 2.3.33.0.0 ≤ v < 4.0.3

Affected range stops below 2.3.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.0.3, so it looks safe — our inference, not a vendor statement

Vaadin · Vaadinmaven

95%

v ≥ 14.0.614.0.6 ≤ v < 14.4.415.0.0 ≤ v < 17.0.1114.0.6

Affected range stops below 14.4.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.0.11, so it looks safe — our inference, not a vendor statement

Vaadin Text Field Flow · Vaadin

60%

v ≥ 2.0.42.0.4

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatchThird Party Advisory

Source: [email protected]

https://github.com/vaadin/flow-components/pull/442

x_refsource_MISCVendor Advisory

Source: [email protected]

https://vaadin.com/security/cve-2021-31405

CVSS

7.5HIGHVaadin

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-400

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