CVE-2024-28868: UmbracoCMS Umbraco Possible User Enumeration Vulnerability

LOW
Advisory Identifier: GHSA-552f-97wf-pmpq
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CVSS 3.7
CWE-204 CWE-203
Published
Advisory Summary

CVE-2024-28868 is a LOW (CVSS 3.7) umbraco possible user enumeration vulnerability (CWE-204: Observable Response Discrepancy) affecting UmbracoCMS libraries in the NuGet ecosystem. The issue involves umbraco possible user enumeration. Remediation is available by upgrading affected packages to version 10.8.5.

CVE-2024-28868 at a Glance

CVE Identifier CVE-2024-28868
GHSA Identifier GHSA-552f-97wf-pmpq
Severity LOW
CVSS v3.1 Base Score 3.7
CWE Classification CWE-204: Observable Response Discrepancy
Affected Product UmbracoCMS
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 3.7

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
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-2024-28868

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

UmbracoCMS fixed: 10.8.5 
Upgrade UmbracoCMS to 10.8.5
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 UmbracoCMS

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-28868, inspect your project dependencies for UmbracoCMS:

inspect dependencies for UmbracoCMS

Analyze the terminal output to locate any version of UmbracoCMS in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 10.8.5), 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-204: Observable Response Discrepancy, where the product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. In UmbracoCMS, 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 A user enumeration attack is possible. ### Affected versions Umbraco 10 with access to the native login screen ### Patches This is fixed in 10.8.5 ### Workarounds Disabling the native login screen, by exclusively use external logins.

CVE-2024-28868 Affected UmbracoCMS Versions

1 component(s)
Fixed Versions:
10.8.5
Product / Package Ecosystem Affected Versions Fixed Version
UmbracoCMS
nuget/UmbracoCMS
NuGet
≥ 10.0.0
< 10.8.5
10.8.5

References

GitHub Advisory / Wiki ADVISORY
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-552f-97wf-pmpq
NVD — CVE-2024-28868 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-28868
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/7e1d1a1968000226cd882fff078b122b8d46c44d
UmbracoCMS Source Repository REPOSITORY
https://github.com/umbraco/Umbraco-CMS

Frequently Asked Questions

What is CVE-2024-28868?
CVE-2024-28868 is a security vulnerability in UmbracoCMS involving Umbraco possible user enumeration under CWE-204: Observable Response Discrepancy.
Which UmbracoCMS versions are affected?
Affected versions include releases prior to 10.8.5 across affected packages: UmbracoCMS.
What version fixes CVE-2024-28868?
Upgrading to 10.8.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is UmbracoCMS affected?
Yes, UmbracoCMS is affected in releases prior to 10.8.5. Upgrade your dependency to 10.8.5 or later.
What is the CVSS score of CVE-2024-28868?
CVE-2024-28868 has a CVSS v3.1 base score of 3.7 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2024-28868?
CVE-2024-28868 is classified under CWE-204: Observable Response Discrepancy (The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.).
How can I check NuGet dependencies for CVE-2024-28868?
Run the dependency tree command: 'inspect dependencies for UmbracoCMS'. 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-552f-97wf-pmpq",
  "modified" : "2025-02-12T18:19:44Z",
  "published" : "2024-03-20T17:54:35Z",
  "aliases" : [ "CVE-2024-28868" ],
  "summary" : "Umbraco possible user enumeration ",
  "details" : "### Impact\nA user enumeration attack is possible.\n\n### Affected versions\nUmbraco 10 with access to the native login screen\n\n### Patches\nThis is fixed in 10.8.5\n\n\n### Workarounds\nDisabling the native login screen, by exclusively use external logins.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "UmbracoCMS"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.0.0"
      }, {
        "fixed" : "10.8.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-552f-97wf-pmpq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-28868"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/7e1d1a1968000226cd882fff078b122b8d46c44d"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/umbraco/Umbraco-CMS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-203", "CWE-204" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-03-20T17:54:35Z",
    "nvd_published_at" : "2024-03-20T20:15:09Z"
  }
}