UpHeron
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Servers and applications

CVE-2023-49278

Brute force exploit can be used to collect valid usernames

Severity
Medium 5.3
Published
12 Dec 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.18.10, 10.8.1, 12.3.4
Also known as
GHSA-7x74-h8cw-qhxq
Sources
NVD, Project advisories (GitHub)

Description

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 brute force exploit can be used to collect valid usernames. Versions 8.18.10, 10.8.1, and 12.3.4 contain a patch for this issue.

Affected software

SoftwareAffected versions
Umbraco CMSServers and applications · cpe:a:umbraco:umbraco_cms
  • From 8.0.0 before 8.18.10
  • From 10.0.0 before 10.8.1
  • From 12.0.0 before 12.3.4
Umbraco CMSServers and applications · github:umbraco/umbraco-cms
  • From 8.0.0 before 8.18.10

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-49278
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-49278
  • GitHub Advisory Database https://github.com/advisories/GHSA-7x74-h8cw-qhxq
  • github.com https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-7x74-h8cw-qhxq