---
id: CVE-2025-9467
title: >-
  When the Vaadin Upload's start listener is used to validate metadata about an
  incoming upload, it is possible to bypass the upload validation
summary: >-
  When the Vaadin Upload's start listener is used to validate metadata about an
  incoming upload, it is possible to bypass the upload validation. 



  Users of affected versions should apply the following mitigation or upgrade.
  Releases that …
severity: medium
cvss: 5.3
cvssVector: >-
  CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/S:N/AU:N/R:U/V:D/RE:L/U:Green
cwe:
  - CWE-20
vendor: vaadin
product: 'com.vaadin:vaadin'
affected:
  - 'com.vaadin:vaadin >= 14.0.0 <= 14.13.0'
  - 'com.vaadin:vaadin >= 23.0.0 <= 23.6.1'
  - 'com.vaadin:vaadin >= 24.0.0 <= 24.7.6'
  - 'com.vaadin:vaadin-server >= 7.0.0 <= 7.7.47'
  - 'com.vaadin:vaadin-server >= 8.0.0 <= 8.28.1'
  - 'com.vaadin:vaadin-upload-flow >= 2.0.0 <= 14.13.0'
  - 'com.vaadin:vaadin-upload-flow >= 23.0.0 <= 23.6.1'
  - 'com.vaadin:vaadin-upload-flow >= 24.0.0 <= 24.7.6'
published: '2025-09-04'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T14:17:07.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-9467'
references:
  - url: 'https://vaadin.com/security/cve-2025-9467'
    label: security@vaadin.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-09-04T13:28:46.739599Z'
cvssSource: cna
epss: 0.00393
epssPercentile: 0.30655
ingestedAt: '2026-09-14T15:23:07.409Z'
---

## Overview

When the Vaadin Upload's start listener is used to validate metadata about an incoming upload, it is possible to bypass the upload validation. 


Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:

Product version
Vaadin 7.0.0 - 7.7.47
Vaadin 8.0.0 - 8.28.1
Vaadin 14.0.0 - 14.13.0
Vaadin 23.0.0 - 23.6.1
Vaadin 24.0.0 - 24.7.6

Mitigation
Upgrade to 7.7.48
Upgrade to 8.28.2
Upgrade to 14.13.1
Upgrade to 23.6.2
Upgrade to 24.7.7 or newer

Please note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24 version.

Artifacts     Maven coordinatesVulnerable versionsFixed versioncom.vaadin:vaadin-server
7.0.0 - 7.7.47
≥7.7.48
com.vaadin:vaadin-server
8.0.0 - 8.28.1
≥8.28.2
com.vaadin:vaadin
14.0.0 - 14.13.0
≥14.13.1
com.vaadin:vaadin23.0.0 - 23.6.1
≥23.6.2
com.vaadin:vaadin24.0.0 - 24.7.6
≥24.7.7com.vaadin:vaadin-upload-flow
2.0.0 - 14.13.0
≥14.13.1
com.vaadin:vaadin-upload-flow
23.0.0 - 23.6.1
≥23.6.2
com.vaadin:vaadin-upload-flow
24.0.0 - 24.7.6
≥24.7.7

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.