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Advisory record · GHSA-9gfh-4fwj-w3rj

Vaadin Framework possible file bypass via upload validation on the server-side

CVSS 5.3 MediumEPSS 0.0040 · 34th percentile

Published by the GitHub Advisory Database at 4 Sept 2025, 15:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.vaadin:vaadin-serverMaven>=7.0.0, <7.7.48 || >=8.0.0, <8.28.27.7.48, 8.28.2
Identifiers
GHSA-9gfh-4fwj-w3rj · CVE-2025-9467
Weakness (CWE)
CWE-20 · CWE-434
Tags
Published
4 Sept 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Vaadin Framework's server-side Upload component (com.vaadin:vaadin-server) versions 7.0.0 to before 7.7.48 and 8.0.0 to before 8.28.2 are affected. When an application relies on the Upload start listener to validate upload metadata, an attacker can bypass that validation and upload files that should have been rejected. Upgrade to version 7.7.48 or 8.28.2, depending on the release line in use.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 4.0 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 CNA (Vaadin)
  • CISA KEV Not listed.
  • EPSS 0.0040, the 34th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.