CVE-2019-25027

Missing output sanitization in default RouteNotFoundError view in com.vaadin:flow-server versions 1.0.0 through 1.0.10 (Vaadin 10.0.0 through 10.0.13), and 1.1.0 through 1.4.2 (Vaadin 11.0.0 through 13.0.5) allows attacker to execute malicious JavaScript via crafted URL

Published: Apr 23, 2021
Updated: Nov 9, 2025
CVE: CVE-2019-25027
GHSA: GHSA-rp4x-wxqv-cf9m
Severity: Medium
Exploit:

CVSS v3:

Severity: Medium
Score: 6.1
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2:

Severity: Low
Score: 4.3
AV:N/AC:M/Au:N/C:N/I:P/A:N

CWEs:

CWE-79
CWE-81

OWASP TOP 10:

A7 - Cross-Site Scripting (XSS)

Affected Software
References

Software	From	Fixed in
vaadin / flow	1.0.0	1.0.11
vaadin / flow	1.1.0	1.4.3
vaadin / vaadin	10.0.0	10.0.14
vaadin / vaadin	11.0.0	13.0.6
com.vaadin / flow-server	1.0.0	1.0.11
com.vaadin / flow-server	1.1.0	1.4.3

https://github.com/vaadin/flow/pull/5498
https://github.com/vaadin/flow/security/advisories/GHSA-rp4x-wxqv-cf9m
https://vaadin.com/security/cve-2019-25027

Vulnerability Database

CVE-2019-25027

Deep Security Visibility Without the Complexity