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TI-2023-26910 Aliases CVE-2023-49274GHSA-8qp8-9rpw-j46c

Umbraco CMS SMTP misconfiguration exposes potential registered user email

Priority LOW 24CWE-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 · NVD. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.4, a user enumeration attack is possible when SMTP is not set up correctly, but reset password is enabled. Versions 8.18.10, 10.8.1, and 12.3.4 contain a patch for this issue.

Why it matters now

EPSS 0.0046 40th percentileScored 2026-11-07
Fix Fixed Umbraco-CMS (umbraco): 8.18.10, 10.8.1, 12.3.4Umbraco.CMS (NuGet): 8.18.10, 10.8.1, 12.3.4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
umbracoUmbraco-CMS8.0.0 to before 8.18.10; 9.0.0-rc001 to before 10.8.1; 11.0.0-rc1 to before 12.3.48.18.10, 10.8.1, 12.3.4Patch availableCNA
—Umbraco.CMS (NuGet)8.0.0 to before 8.18.108.18.10Patch availableGHSA-8qp8-9rpw-j46c
—Umbraco.CMS (NuGet)9.0.0 to before 10.8.110.8.1Patch availableGHSA-8qp8-9rpw-j46c
—Umbraco.CMS (NuGet)11.0.0 to before 12.3.412.3.4Patch availableGHSA-8qp8-9rpw-j46c
  • Umbraco-CMS Vendorumbraco Affected 8.0.0 to before 8.18.10; 9.0.0-rc001 to before 10.8.1; 11.0.0-rc1 to before 12.3.4 Fixed in 8.18.10, 10.8.1, 12.3.4 Patch available CNA
  • Umbraco.CMS (NuGet) Vendor— Affected 8.0.0 to before 8.18.10 Fixed in 8.18.10 Patch available GHSA-8qp8-9rpw-j46c
  • Umbraco.CMS (NuGet) Vendor— Affected 9.0.0 to before 10.8.1 Fixed in 10.8.1 Patch available GHSA-8qp8-9rpw-j46c
  • Umbraco.CMS (NuGet) Vendor— Affected 11.0.0 to before 12.3.4 Fixed in 12.3.4 Patch available GHSA-8qp8-9rpw-j46c

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*8.0.0 to before 8.18.10; 10.0.0 to before 10.8.1; 12.0.0 to before 12.3.4Vulnerableumbraco
  • cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.18.10; 10.0.0 to before 10.8.1; 12.0.0 to before 12.3.4 Vulnerable ·umbraco

Remediation

  • Fix · CNA Umbraco-CMS (umbraco) Fixed in 8.18.10, 10.8.1, 12.3.4
  • Fix · GHSA-8qp8-9rpw-j46c Umbraco.CMS (NuGet) Fixed in 8.18.10 Advisory →
  • Fix · GHSA-8qp8-9rpw-j46c Umbraco.CMS (NuGet) Fixed in 10.8.1 Advisory →
  • Fix · GHSA-8qp8-9rpw-j46c Umbraco.CMS (NuGet) Fixed in 12.3.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-49274
  2. 2026-10-03 Alias added: GHSA-8qp8-9rpw-j46c

References

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