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TI-2025-29407 Aliases CVE-2025-46736GHSA-4g8m-5mj5-c8xg

Umbraco Makes User Enumeration Feasible Based on Timing of Login Response

Priority LOW 30CWE-204Published · 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-204.

Summary

Umbraco is a free and open source .NET content management system. Prior to versions 10.8.10 and 13.8.1, based on an analysis of the timing of post login API responses, it's possible to determine whether an account exists. The issue is patched in versions 10.8.10 and 13.8.1. No known workarounds are available.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00389 33rd percentileScored 2026-11-07
Fix Fixed Umbraco-CMS (umbraco): 13.8.1, 10.8.10Umbraco.Cms (NuGet): 13.8.1, 10.8.10

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-CMS11.0.0-rc1 to before 13.8.1; before 10.8.1013.8.1, 10.8.10Patch availableCNA
—Umbraco.Cms (NuGet)11.0.0-rc1 to before 13.8.113.8.1Patch availableGHSA-4g8m-5mj5-c8xg
—Umbraco.Cms (NuGet)before 10.8.1010.8.10Patch availableGHSA-4g8m-5mj5-c8xg
  • Umbraco-CMS Vendorumbraco Affected 11.0.0-rc1 to before 13.8.1; before 10.8.10 Fixed in 13.8.1, 10.8.10 Patch available CNA
  • Umbraco.Cms (NuGet) Vendor— Affected 11.0.0-rc1 to before 13.8.1 Fixed in 13.8.1 Patch available GHSA-4g8m-5mj5-c8xg
  • Umbraco.Cms (NuGet) Vendor— Affected before 10.8.10 Fixed in 10.8.10 Patch available GHSA-4g8m-5mj5-c8xg

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*before 10.8.10; 10.9.0 to before 13.8.1Vulnerableumbraco
  • cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions before 10.8.10; 10.9.0 to before 13.8.1 Vulnerable ·umbraco

Remediation

  • Fix · CNA Umbraco-CMS (umbraco) Fixed in 13.8.1, 10.8.10
  • Fix · GHSA-4g8m-5mj5-c8xg Umbraco.Cms (NuGet) Fixed in 13.8.1 Advisory →
  • Fix · GHSA-4g8m-5mj5-c8xg Umbraco.Cms (NuGet) Fixed in 10.8.10 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-46736
  2. 2026-10-03 Alias added: GHSA-4g8m-5mj5-c8xg

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