Possibility to bypass file upload validation on the server-side

Description

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

Scores

EPSS (exploitation in 30 days)

0.39% · top 66% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

• CWE-20 Improper Input Validation (opens in a new tab)All about CWE-20 and its CVEs

Affected products

• vaadin · vaadin

  • affected 14.0.0 – ≤ 14.13.0
  • affected 23.0.0 – ≤ 23.6.1
  • affected 24.0.0 – ≤ 24.7.6

• vaadin · framework

  • affected 7.0.0 – ≤ 7.7.47
  • affected 8.0.0 – ≤ 8.28.1

• vaadin · vaadin-upload-flow

  • affected 2.0.0 – ≤ 14.13.0
  • affected 23.0.0 – ≤ 23.6.1
  • affected 24.0.0 – ≤ 24.7.6

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Mavencom.vaadin:vaadin-serverGHSA-9gfh-4fwj-w3rj (opens in a new tab)

What to do

Solution: Users of affected versions should apply the following mitigation or upgrade.

Workaround: This issue can also be worked around without updating the version by validating the upload metadata again in the Upload's finished listener.

References (1)

• https://vaadin.com/security/cve-2025-9467 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-9gfh-4fwj-w3rj (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-9467](https://trackcve.app/badge/CVE-2025-9467.svg)](https://trackcve.app/cve/CVE-2025-9467)

Record last updated 14 Sept 2026, 13:12 UTC.