CVE-2025-9467: Vaadin server Vaadin Framework Possible File Bypass Vulnerability

MODERATE
Advisory Identifier: GHSA-9gfh-4fwj-w3rj
Share
CWE-20 CWE-434
Published
Advisory Summary

CVE-2025-9467 is a MODERATE vaadin framework possible file bypass vulnerability (CWE-20: Improper Input Validation) affecting Vaadin server libraries in the Maven ecosystem. The issue involves vaadin framework possible file bypass via upload validation on the server-side. Remediation is available by upgrading affected packages to version 7.7.48, 8.28.2.

CVE-2025-9467 at a Glance

CVE Identifier CVE-2025-9467
GHSA Identifier GHSA-9gfh-4fwj-w3rj
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-20: Improper Input Validation
Affected Product Vaadin server
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2025-9467

To remediate this vulnerability, upgrade all affected Vaadin server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

com.vaadin:vaadin-server fixed: 7.7.48 
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-server</artifactId>
    <version>7.7.48</version>
</dependency>
com.vaadin:vaadin-server fixed: 8.28.2 
<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-server</artifactId>
    <version>8.28.2</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=com.vaadin

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2025-9467, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=com.vaadin

Analyze the terminal output to locate any version of Vaadin server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.7.48), your application is affected.

Note: The mvn dependency:tree -Dincludes=com.vaadin command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Vaadin server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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 upgrade to a more recent Vaadin version.

CVE-2025-9467 Affected Vaadin server Versions

2 component(s)
Fixed Versions:
7.7.488.28.2
Product / Package Ecosystem Affected Versions Fixed Version
com.vaadin:vaadin-server
maven/com.vaadin/vaadin-server
Maven
≥ 7.0.0
< 7.7.48
7.7.48
com.vaadin:vaadin-server
maven/com.vaadin/vaadin-server
Maven
≥ 8.0.0
< 8.28.2
8.28.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vaadin/framework/security/advisories/GHSA-9gfh-4fwj-w3rj
NVD — CVE-2025-9467 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9467
Vaadin server Source Repository REPOSITORY
https://github.com/vaadin/flow-components/pull/7616
Security Fix Commit FIX COMMIT
https://github.com/vaadin/flow-components/commit/bfe9e507cdcc5d90a2312c8f0162f798a29ba635
Vaadin server Source Repository REPOSITORY
https://github.com/vaadin/framework
Vaadin server Security Information SECURITY
https://vaadin.com/security/cve-2025-9467

Frequently Asked Questions

What is CVE-2025-9467?
CVE-2025-9467 is a security vulnerability in Vaadin server involving Vaadin Framework possible file bypass via upload validation on the server-side under CWE-20: Improper Input Validation.
Which Vaadin server versions are affected?
Affected versions include releases prior to 7.7.48, 8.28.2 across affected packages: com.vaadin:vaadin-server.
What version fixes CVE-2025-9467?
Upgrading to 7.7.48, 8.28.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vaadin-server affected?
Yes, com.vaadin:vaadin-server is affected in releases prior to 7.7.48, 8.28.2. Upgrade your dependency to 7.7.48, 8.28.2 or later.
What CWE is associated with CVE-2025-9467?
CVE-2025-9467 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Maven dependencies for CVE-2025-9467?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.vaadin'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9gfh-4fwj-w3rj",
  "modified" : "2025-09-04T15:54:59Z",
  "published" : "2025-09-04T15:54:58Z",
  "aliases" : [ "CVE-2025-9467" ],
  "summary" : "Vaadin Framework possible file bypass via upload validation on the server-side",
  "details" : "### Description\nWhen 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 upgrade to a more recent Vaadin version.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.vaadin:vaadin-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.7.48"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 7.7.47"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.vaadin:vaadin-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.28.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.28.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vaadin/framework/security/advisories/GHSA-9gfh-4fwj-w3rj"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-9467"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vaadin/flow-components/pull/7616"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vaadin/flow-components/commit/bfe9e507cdcc5d90a2312c8f0162f798a29ba635"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vaadin/framework"
  }, {
    "type" : "WEB",
    "url" : "https://vaadin.com/security/cve-2025-9467"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-434" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-09-04T15:54:58Z",
    "nvd_published_at" : "2025-09-04T10:42:34Z"
  }
}