title: Reflected cross-site scripting in development mode handler in Vaadin 14, 15-19
description: URL encoding error in development mode handler in com.vaadin:flow-server versions 2.0.0 through 2.6.1 (Vaadin 14.0.0 through 14.6.1), 3.0.0 through 6.0.9 (Vaadin 15.0.0 through 19.0.8) allows local user to execute arbitrary JavaScript code by opening crafted URL in browser.
problem types: CWE-172 Encoding Error
affected:
{
product: Vaadin
vendor: Vaadin
versions:
lessThan: unspecified, status: affected, version: 14.0.0, versionType: custom
lessThanOrEqual: 14.6.1, status: affected, version: unspecified, versionType: custom
lessThan: unspecified, status: affected, version: 15.0.0, versionType: custom
lessThanOrEqual: 19.0.8, status: affected, version: unspecified, versionType: custom
}
{
product: flow-server
vendor: Vaadin
versions:
lessThan: unspecified, status: affected, version: 2.0.0, versionType: custom
lessThanOrEqual: 2.6.1, status: affected, version: unspecified, versionType: custom
lessThan: unspecified, status: affected, version: 3.0.0, versionType: custom
lessThanOrEqual: 6.0.9, status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: LOCAL
availabilityImpact: NONE
baseScore: 2.5
baseSeverity: LOW
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
version: 3.1
]