CVE-2024-43377: Umbraco.Cms Umbraco CMS Improper Access Control Vulnerability

MODERATE
Advisory Identifier: GHSA-hrww-x3fq-xcvh
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CVSS 5.4
CWE-284
Published
Advisory Summary

CVE-2024-43377 is a MODERATE (CVSS 5.4) umbraco cms improper access control vulnerability (CWE-284: Improper Access Control) affecting Umbraco.Cms libraries in the NuGet ecosystem. The issue involves umbraco cms improper access control vulnerability. Remediation is available by upgrading affected packages to version 14.1.2.

CVE-2024-43377 at a Glance

CVE Identifier CVE-2024-43377
GHSA Identifier GHSA-hrww-x3fq-xcvh
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-284: Improper Access Control
Affected Product Umbraco.Cms
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 5.4

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

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

How to Fix CVE-2024-43377

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: 14.1.2 
Upgrade Umbraco.Cms to 14.1.2
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-2024-43377, 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 14.1.2), 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-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. 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 As an authenticated user one can access a few unintended endpoints ### Explanation of the vulnerability Few endpoints in Umbraco Management API was not protected by a specific section. These just required you to be authenticated. Due to the fact that a member is also just authenticated, it was possible to get info from these endpoints using a member token.

CVE-2024-43377 Affected Umbraco.Cms Versions

1 component(s)
Fixed Versions:
14.1.2
Product / Package Ecosystem Affected Versions Fixed Version
Umbraco.Cms
nuget/Umbraco.Cms
NuGet
≥ 14.0.0
< 14.1.2
14.1.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hrww-x3fq-xcvh
NVD — CVE-2024-43377 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-43377
Security Fix Commit FIX COMMIT
https://github.com/umbraco/Umbraco-CMS/commit/72bef8861d94a39d5cc9530a04c4797b91fcbecf
Umbraco.Cms Source Repository REPOSITORY
https://github.com/umbraco/Umbraco-CMS

Frequently Asked Questions

What is CVE-2024-43377?
CVE-2024-43377 is a security vulnerability in Umbraco.Cms involving Umbraco CMS Improper Access Control vulnerability under CWE-284: Improper Access Control.
Which Umbraco.Cms versions are affected?
Affected versions include releases prior to 14.1.2 across affected packages: Umbraco.Cms.
What version fixes CVE-2024-43377?
Upgrading to 14.1.2 (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 14.1.2. Upgrade your dependency to 14.1.2 or later.
What is the CVSS score of CVE-2024-43377?
CVE-2024-43377 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2024-43377?
CVE-2024-43377 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check NuGet dependencies for CVE-2024-43377?
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-hrww-x3fq-xcvh",
  "modified" : "2024-09-17T16:19:46Z",
  "published" : "2024-08-20T18:32:26Z",
  "aliases" : [ "CVE-2024-43377" ],
  "summary" : "Umbraco CMS Improper Access Control vulnerability",
  "details" : "### Impact\nAs an authenticated user one can access a few unintended endpoints\n\n### Explanation of the vulnerability\nFew endpoints in Umbraco Management API was not protected by a specific section. These just required you to be authenticated. Due to the fact that a member is also just authenticated, it was possible to get info from these endpoints using a member token.\n\n\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.Cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "14.0.0"
      }, {
        "fixed" : "14.1.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hrww-x3fq-xcvh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-43377"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/commit/72bef8861d94a39d5cc9530a04c4797b91fcbecf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/umbraco/Umbraco-CMS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-08-20T18:32:26Z",
    "nvd_published_at" : "2024-08-20T15:15:23Z"
  }
}