title: Regular expression Denial of Service (ReDoS) in EmailValidator class in Vaadin 7
description: Unsafe validation RegEx in EmailValidator class in com.vaadin:vaadin-server versions 7.0.0 through 7.7.21 (Vaadin 7.0.0 through 7.7.21) allows attackers to cause uncontrolled resource consumption by submitting malicious email addresses.
problem types: CWE-400 Uncontrolled Resource Consumption
affected:
{
product: Vaadin
vendor: Vaadin
versions:
lessThan: *, status: affected, version: 7.0.0, versionType: custom
}
{
product: vaadin-server
vendor: Vaadin
versions:
lessThan: *, status: affected, version: 7.0.0, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]