CVE-2025-49147: Umbraco.Cms Umbraco CMS Disclosure Of Configured Vulnerability

MODERATE
Advisory Identifier: GHSA-pgvc-6h2p-q4f6
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CVSS 5.3
CWE-497
Published
Advisory Summary

CVE-2025-49147 is a MODERATE (CVSS 5.3) umbraco cms disclosure of configured vulnerability (CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere) affecting Umbraco.Cms libraries in the NuGet ecosystem. The issue involves umbraco cms disclosure of configured password requirements. Remediation is available by upgrading affected packages to version 10.8.11, 13.9.2.

CVE-2025-49147 at a Glance

CVE Identifier CVE-2025-49147
GHSA Identifier GHSA-pgvc-6h2p-q4f6
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere
Affected Product Umbraco.Cms
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:U/C:L/I:N/A:N).

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

How to Fix CVE-2025-49147

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: 10.8.11 
Upgrade Umbraco.Cms to 10.8.11
Umbraco.Cms fixed: 13.9.2 
Upgrade Umbraco.Cms to 13.9.2
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-2025-49147, 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 10.8.11), 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-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere, where the product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does. 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 Via a request to an anonymously authenticated endpoint it's possible to retrieve information about the configured password requirements. The information available is limited but would perhaps give some additional detail useful for someone attempting to brute force derive a user's password. The vulnerability can be found in the supported Umbraco versions 10 and 13. It was not exposed in Umbraco 7 or 8, nor in 14 or higher versions. ### Patches Patched in 10.8.11 and 13.9.2

CVE-2025-49147 Affected Umbraco.Cms Versions

2 component(s)
Fixed Versions:
10.8.1113.9.2
Product / Package Ecosystem Affected Versions Fixed Version
Umbraco.Cms
nuget/Umbraco.Cms
NuGet
≥ 10.0.0
< 10.8.11
10.8.11
Umbraco.Cms
nuget/Umbraco.Cms
NuGet
≥ 13.0.0
< 13.9.2
13.9.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-pgvc-6h2p-q4f6
NVD — CVE-2025-49147 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-49147
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/b4144564c836ec6929111ce2a12eb1f67b42d61e
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/d8f68d2c40f8e158bd81d469f25ef3a4e1d86c4c
Umbraco.Cms Source Repository REPOSITORY
https://github.com/umbraco/Umbraco-CMS

Frequently Asked Questions

What is CVE-2025-49147?
CVE-2025-49147 is a security vulnerability in Umbraco.Cms involving Umbraco CMS disclosure of configured password requirements under CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere.
Which Umbraco.Cms versions are affected?
Affected versions include releases prior to 10.8.11, 13.9.2 across affected packages: Umbraco.Cms.
What version fixes CVE-2025-49147?
Upgrading to 10.8.11, 13.9.2 (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 10.8.11, 13.9.2. Upgrade your dependency to 10.8.11, 13.9.2 or later.
What is the CVSS score of CVE-2025-49147?
CVE-2025-49147 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2025-49147?
CVE-2025-49147 is classified under CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere (The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.).
How can I check NuGet dependencies for CVE-2025-49147?
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-pgvc-6h2p-q4f6",
  "modified" : "2025-06-28T00:06:29Z",
  "published" : "2025-06-24T19:36:32Z",
  "aliases" : [ "CVE-2025-49147" ],
  "summary" : "Umbraco CMS disclosure of configured password requirements ",
  "details" : "### Impact\nVia a request to an anonymously authenticated endpoint it's possible to retrieve information about the configured password requirements.  The information available is limited but would perhaps give some additional detail useful for someone attempting to brute force derive a user's password.\n\nThe vulnerability can be found in the supported Umbraco versions 10 and 13.  It was not exposed in Umbraco 7 or 8, nor in 14 or higher versions.\n\n### Patches\nPatched in 10.8.11 and 13.9.2",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.0.0"
      }, {
        "fixed" : "10.8.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "13.0.0"
      }, {
        "fixed" : "13.9.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-pgvc-6h2p-q4f6"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-49147"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/b4144564c836ec6929111ce2a12eb1f67b42d61e"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/d8f68d2c40f8e158bd81d469f25ef3a4e1d86c4c"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/umbraco/Umbraco-CMS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-497" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-24T19:36:32Z",
    "nvd_published_at" : "2025-06-24T18:15:25Z"
  }
}