CVE-2025-67288: Umbraco.Cms Umbraco CMS Has An Arbitrary Vulnerability

MODERATE
Advisory Identifier: GHSA-54mj-vcvj-q3v5
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CVSS 10.0
CWE-434 CWE-79
Published
Advisory Summary

CVE-2025-67288 is a MODERATE (CVSS 10.0) umbraco cms has an arbitrary vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Umbraco.Cms libraries in the NuGet ecosystem. The issue involves umbraco cms has an arbitrary file upload vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2025-67288 at a Glance

CVE Identifier CVE-2025-67288
GHSA Identifier GHSA-54mj-vcvj-q3v5
Severity MODERATE
CVSS v3.1 Base Score 10.0
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Umbraco.Cms
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 10.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2025-67288

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

Umbraco.Cms fixed: Latest secure release 
Upgrade Umbraco.Cms to Latest secure release
Verify Direct and Transitive Dependencies

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

inspect dependencies for Umbraco.Cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-67288, inspect your project dependencies for Umbraco.Cms:

inspect dependencies for Umbraco.Cms

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

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In Umbraco.Cms, 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

An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code via uploading a crafted PDF file. While Umbraco provides [hooks to perform file validation](https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation), it does not do implement filtering by default. Users are expected to implement their own validation. Note: This vulnerability is [disputed by Ubraco](https://github.com/github/advisory-database/pull/6633).

CVE-2025-67288 Affected Umbraco.Cms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
Umbraco.Cms
nuget/Umbraco.Cms
NuGet
≤ 16.3.3

References

NVD — CVE-2025-67288 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-67288
Umbraco.Cms Source Repository REPOSITORY
https://github.com/github/advisory-database/pull/6633
Umbraco.Cms Security Information SECURITY
https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation
Umbraco.Cms Source Repository REPOSITORY
https://github.com/umbraco/Umbraco-CMS
Umbraco.Cms Source Repository REPOSITORY
https://github.com/vuquyen03/CVE/tree/main/CVE-2025-67288
umbraco.com WEB
http://umbraco.com

Frequently Asked Questions

What is CVE-2025-67288?
CVE-2025-67288 is a security vulnerability in Umbraco.Cms involving Umbraco CMS has an arbitrary file upload vulnerability under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Umbraco.Cms versions are affected?
Affected versions include releases prior to current release patches across affected packages: Umbraco.Cms.
What version fixes CVE-2025-67288?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is Umbraco.Cms affected?
Yes, Umbraco.Cms is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2025-67288?
CVE-2025-67288 has a CVSS v3.1 base score of 10.0 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2025-67288?
CVE-2025-67288 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check NuGet dependencies for CVE-2025-67288?
Run the dependency tree command: 'inspect dependencies for Umbraco.Cms'. 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-54mj-vcvj-q3v5",
  "modified" : "2026-01-22T16:53:47Z",
  "published" : "2025-12-22T21:30:33Z",
  "aliases" : [ "CVE-2025-67288" ],
  "summary" : "Umbraco CMS has an arbitrary file upload vulnerability",
  "details" : "An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code via uploading a crafted PDF file. While Umbraco provides [hooks to perform file validation](https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation), it does not do implement filtering by default. Users are expected to implement their own validation.\n\nNote: This vulnerability is [disputed by Ubraco](https://github.com/github/advisory-database/pull/6633).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "16.3.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-67288"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/github/advisory-database/pull/6633"
  }, {
    "type" : "WEB",
    "url" : "https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/umbraco/Umbraco-CMS"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vuquyen03/CVE/tree/main/CVE-2025-67288"
  }, {
    "type" : "WEB",
    "url" : "http://umbraco.com"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434", "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-12-22T22:47:47Z",
    "nvd_published_at" : "2025-12-22T19:15:49Z"
  }
}