CVE-2025-32017: Umbraco.Cms Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-q62r-8ppj-xvf4
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CVSS 8.8
CWE-23 CWE-22
Published
Advisory Summary

CVE-2025-32017 is a HIGH (CVSS 8.8) path traversal vulnerability (CWE-23: Relative Path Traversal) affecting Umbraco.Cms libraries in the NuGet ecosystem. The issue involves umbraco has a management api vulnerability to path traversal with authenticated users. Remediation is available by upgrading affected packages to version 14.3.4, 15.3.1.

CVE-2025-32017 at a Glance

CVE Identifier CVE-2025-32017
GHSA Identifier GHSA-q62r-8ppj-xvf4
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-23: Relative Path Traversal
Affected Product Umbraco.Cms
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 8.8

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

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

How to Fix CVE-2025-32017

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: 14.3.4 
Upgrade Umbraco.Cms to 14.3.4
Umbraco.Cms fixed: 15.3.1 
Upgrade Umbraco.Cms to 15.3.1
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-2025-32017, 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 14.3.4), 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-23: Relative Path Traversal, where the product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. 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

### Impact Authenticated users to the Umbraco backoffice are able to craft management API request that exploit a path traversal vulnerability to upload files into a incorrect location. ### Patches The issue affects Umbraco 14+ and is patched in 14.3.4 and 15.3.1. ### Workarounds Umbraco supports the configuration of [allowed](https://docs.umbraco.com/umbraco-cms/reference/configuration/contentsettings#allowed-upload-file-extensions) and [disallowed file extensions](https://docs.umbraco.com/umbraco-cms/reference/configuration/contentsettings#disallowed-upload-file-extensions). Using these options to allow only necessary file extensions significantly reduces the scope of the vulnerability.

CVE-2025-32017 Affected Umbraco.Cms Versions

2 component(s)
Fixed Versions:
14.3.415.3.1
Product / Package Ecosystem Affected Versions Fixed Version
Umbraco.Cms
nuget/Umbraco.Cms
NuGet
≥ 14.0.0--preview004
< 14.3.4
14.3.4
Umbraco.Cms
nuget/Umbraco.Cms
NuGet
≥ 15.0.0-rc1
< 15.3.1
15.3.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-q62r-8ppj-xvf4
NVD — CVE-2025-32017 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-32017
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/06a2a500b358ce15b1e228391eb60bd517c6e833
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/d3c1443b14b1076faf13d1bcecc42860fdf5fad8
Umbraco.Cms Source Repository REPOSITORY
https://github.com/umbraco/Umbraco-CMS

Frequently Asked Questions

What is CVE-2025-32017?
CVE-2025-32017 is a security vulnerability in Umbraco.Cms involving Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users under CWE-23: Relative Path Traversal.
Which Umbraco.Cms versions are affected?
Affected versions include releases prior to 14.3.4, 15.3.1 across affected packages: Umbraco.Cms.
What version fixes CVE-2025-32017?
Upgrading to 14.3.4, 15.3.1 (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 14.3.4, 15.3.1. Upgrade your dependency to 14.3.4, 15.3.1 or later.
What is the CVSS score of CVE-2025-32017?
CVE-2025-32017 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2025-32017?
CVE-2025-32017 is classified under CWE-23: Relative Path Traversal (The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory.).
How can I check NuGet dependencies for CVE-2025-32017?
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-q62r-8ppj-xvf4",
  "modified" : "2025-04-09T17:13:35Z",
  "published" : "2025-04-09T12:49:38Z",
  "aliases" : [ "CVE-2025-32017" ],
  "summary" : "Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users",
  "details" : "### Impact\nAuthenticated users to the Umbraco backoffice are able to craft management API request that exploit a path traversal vulnerability to upload files into a incorrect location.\n\n### Patches\nThe issue affects Umbraco 14+ and is patched in 14.3.4 and 15.3.1.\n\n### Workarounds\nUmbraco supports the configuration of [allowed](https://docs.umbraco.com/umbraco-cms/reference/configuration/contentsettings#allowed-upload-file-extensions) and [disallowed file extensions](https://docs.umbraco.com/umbraco-cms/reference/configuration/contentsettings#disallowed-upload-file-extensions).  Using these options to allow only necessary file extensions significantly reduces the scope of the vulnerability.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "14.0.0--preview004"
      }, {
        "fixed" : "14.3.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "15.0.0-rc1"
      }, {
        "fixed" : "15.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-q62r-8ppj-xvf4"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-32017"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/06a2a500b358ce15b1e228391eb60bd517c6e833"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/d3c1443b14b1076faf13d1bcecc42860fdf5fad8"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/umbraco/Umbraco-CMS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-23" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-09T12:49:38Z",
    "nvd_published_at" : "2025-04-08T16:15:27Z"
  }
}