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TI-2025-17778 Aliases CVE-2025-24011GHSA-hmg4-wwm5-p999

Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes

Priority LOW 33CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

Umbraco is a free and open source .NET content management system. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, it's possible to determine whether an account exists based on an analysis of response codes and timing of Umbraco management API responses. Versions 14.3.2 and 15.1.2 contain a patch. No known workarounds are available.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01609 76th percentileScored 2026-11-07
Fix Fixed Umbraco-CMS (umbraco): 14.3.2, 15.1.2Umbraco.Cms (NuGet): 14.3.2, 15.1.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
umbracoUmbraco-CMS14.0.0 to before 14.3.2; 15.0.0 to before 15.1.214.3.2, 15.1.2Patch availableCNA
—Umbraco.Cms (NuGet)14.0.0 to before 14.3.214.3.2Patch availableGHSA-hmg4-wwm5-p999
—Umbraco.Cms (NuGet)15.0.0 to before 15.1.215.1.2Patch availableGHSA-hmg4-wwm5-p999
  • Umbraco-CMS Vendorumbraco Affected 14.0.0 to before 14.3.2; 15.0.0 to before 15.1.2 Fixed in 14.3.2, 15.1.2 Patch available CNA
  • Umbraco.Cms (NuGet) Vendor— Affected 14.0.0 to before 14.3.2 Fixed in 14.3.2 Patch available GHSA-hmg4-wwm5-p999
  • Umbraco.Cms (NuGet) Vendor— Affected 15.0.0 to before 15.1.2 Fixed in 15.1.2 Patch available GHSA-hmg4-wwm5-p999

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*14.0.0 to before 14.3.2; 15.0.0 to before 15.1.2Vulnerableumbraco
  • cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions 14.0.0 to before 14.3.2; 15.0.0 to before 15.1.2 Vulnerable ·umbraco

Remediation

  • Fix · CNA Umbraco-CMS (umbraco) Fixed in 14.3.2, 15.1.2
  • Fix · GHSA-hmg4-wwm5-p999 Umbraco.Cms (NuGet) Fixed in 14.3.2 Advisory →
  • Fix · GHSA-hmg4-wwm5-p999 Umbraco.Cms (NuGet) Fixed in 15.1.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-24011
  2. 2026-10-03 Alias added: GHSA-hmg4-wwm5-p999

References

Patch 2

Advisory 2

Other 1

  • TI-2025-41183 An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute… CVSS 3.1CRITICAL 10.0
  • TI-2012-05477 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE CVSS 4.0CRITICAL 9.3
  • TI-2021-22392 Umbraco v8.14.1 - 'baseUrl' SSRF CVSS 4.0MEDIUM 6.9
  • TI-2024-36846 A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers… CVSS 3.1MEDIUM 6.5
  • TI-2019-15240 Umbraco CMS 4.11.8 through 7.15.10, and 7.12.4, allows Remote Code Execution by… CVSS 3.1HIGH 7.2
  • TI-2020-04738 Cross-site scripting in Umbraco CMS CVSS 3.1MEDIUM 5.4
See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences