Umbraco Allows User Enumeration Feasible Based On Management API Timing and Response Codes
Impact
Based on an analysis of response codes and timing of Umbraco 14+ management API responses, it's possible to determine whether an account exists.
Patches
Patched in 14.3.2 and 15.1.2.
Workarounds
None available.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Umbraco.Cms | >= 14.0.0, < 14.3.2, >= 15.0.0, < 15.1.2 | 14.3.2, 15.1.2 |
References
- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hmg4-wwm5-p999
- https://nvd.nist.gov/vuln/detail/CVE-2025-24011
- https://github.com/umbraco/Umbraco-CMS/commit/559c6c9f312df1d6eb1bde82c4b81c0896da6382
- https://github.com/umbraco/Umbraco-CMS/commit/839b6816f2ae3e5f54459a0f09dad6b17e2d1e07
- https://github.com/umbraco/Umbraco-CMS
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-200, CWE-203- Platform
- .NET (NuGet)
- Package
Umbraco.Cms- Disclosed
- 21.01.2025
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-hmg4-wwm5-p999 - CC BY 4.0
Vulnerability history: Umbraco.Cms
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 29
- First → latest
- 05.2022 09.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 5
- Medium 17
- Low 7
Disclosures per year
- 2022: 2
- 2023: 8
- 2024: 5
- 2025: 8
- 2026: 6
-
Umbraco Allows User Enumeration Feasible Based On Management API Timing and Response Codes this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.