CVE-2024-48926: Umbraco.CMS Umbraco CMS Logout Page Displayed Vulnerability

MODERATE
Advisory Identifier: GHSA-fp6q-gccw-7qqm
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CVSS 4.2
CWE-613
Published
Advisory Summary

CVE-2024-48926 is a MODERATE (CVSS 4.2) umbraco cms logout page displayed vulnerability (CWE-613: Insufficient Session Expiration) affecting Umbraco.CMS libraries in the NuGet ecosystem. The issue involves umbraco cms logout page displayed before session expiration. Remediation is available by upgrading affected packages to version 13.5.2, 10.8.7, 8.18.15.

CVE-2024-48926 at a Glance

CVE Identifier CVE-2024-48926
GHSA Identifier GHSA-fp6q-gccw-7qqm
Severity MODERATE
CVSS v3.1 Base Score 4.2
CWE Classification CWE-613: Insufficient Session Expiration
Affected Product Umbraco.CMS
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 4.2

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

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

How to Fix CVE-2024-48926

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: 13.5.2 
Upgrade Umbraco.CMS to 13.5.2
Umbraco.CMS fixed: 10.8.7 
Upgrade Umbraco.CMS to 10.8.7
UmbracoCMS fixed: 8.18.15 
Upgrade UmbracoCMS to 8.18.15
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-2024-48926, 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 13.5.2), 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-613: Insufficient Session Expiration, where according to wasc, "insufficient session expiration is when a web site permits an attacker to reuse old session credentials or session ids for authorization.". 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 The Backoffice displays the logout page with a session timeout message before the server session has fully expired, causing users to believe they have been logged out approximately 30 seconds before they actually are.

CVE-2024-48926 Affected Umbraco.CMS Versions

3 component(s)
Fixed Versions:
13.5.210.8.78.18.15
Product / Package Ecosystem Affected Versions Fixed Version
Umbraco.CMS
nuget/Umbraco.CMS
NuGet
≥ 13.0.0
< 13.5.2
13.5.2
Umbraco.CMS
nuget/Umbraco.CMS
NuGet
≥ 10.0.0
< 10.8.7
10.8.7
UmbracoCMS
nuget/UmbracoCMS
NuGet
≥ 8.0.0
< 8.18.15
8.18.15

References

GitHub Advisory / Wiki ADVISORY
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-fp6q-gccw-7qqm
NVD — CVE-2024-48926 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-48926
Umbraco.CMS Source Repository REPOSITORY
https://github.com/umbraco/Umbraco-CMS

Frequently Asked Questions

What is CVE-2024-48926?
CVE-2024-48926 is a security vulnerability in Umbraco.CMS involving Umbraco CMS logout page displayed before session expiration under CWE-613: Insufficient Session Expiration.
Which Umbraco.CMS versions are affected?
Affected versions include releases prior to 13.5.2, 10.8.7, 8.18.15 across affected packages: Umbraco.CMS, UmbracoCMS.
What version fixes CVE-2024-48926?
Upgrading to 13.5.2, 10.8.7, 8.18.15 (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 13.5.2, 10.8.7. Upgrade your dependency to 13.5.2, 10.8.7 or later.
Is UmbracoCMS affected?
Yes, UmbracoCMS is affected in releases prior to 8.18.15. Upgrade your dependency to 8.18.15 or later.
What is the CVSS score of CVE-2024-48926?
CVE-2024-48926 has a CVSS v3.1 base score of 4.2 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2024-48926?
CVE-2024-48926 is classified under CWE-613: Insufficient Session Expiration (According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.").
How can I check NuGet dependencies for CVE-2024-48926?
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-fp6q-gccw-7qqm",
  "modified" : "2024-10-22T19:22:29Z",
  "published" : "2024-10-22T17:55:01Z",
  "aliases" : [ "CVE-2024-48926" ],
  "summary" : "Umbraco CMS logout page displayed before session expiration",
  "details" : "### Impact\nThe Backoffice displays the logout page with a session timeout message before the server session has fully expired, causing users to believe they have been logged out approximately 30 seconds before they actually are.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.CMS"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "13.0.0"
      }, {
        "fixed" : "13.5.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Umbraco.CMS"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.0.0"
      }, {
        "fixed" : "10.8.7"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "UmbracoCMS"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.18.15"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-fp6q-gccw-7qqm"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-48926"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/umbraco/Umbraco-CMS"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-613" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-10-22T17:55:01Z",
    "nvd_published_at" : "2024-10-22T16:15:08Z"
  }
}