CVE-2025-24011
Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes
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.
- Record
CVE-2025-24011- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
EUVDEUVD-2025-0170
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.
- Record
EUVD-2025-0170- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hmg4-wwm5-p999
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.
- Record
GHSA-hmg4-wwm5-p999- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200, CWE-203
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-24011- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200, CWE-203
- Updated
- 2026-11-02
OSV
Umbraco CMS Vulnerable to User Enumeration Feasible Based On Management API Timing and Response Codes
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.
- Record
CVE-2025-24011- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSVGHSA-hmg4-wwm5-p999
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.
- Record
GHSA-hmg4-wwm5-p999- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200, CWE-203
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Umbraco.CmsNuGet |
14.0.0 up to 14.3.2 | 14.3.2 |
Umbraco.CmsNuGet |
15.0.0 up to 15.1.2 | 15.1.2 |
Umbraco.CmsNuGet |
14.0.0 up to 14.3.2, plus listed versions 14.1.014.1.0-rc14.1.0-rc214.1.114.1.2 Show 7 moreShow less14.2.014.2.0-rc14.2.0-rc214.2.0-rc314.3.014.3.0-rc14.3.1 |
14.3.2 |
Umbraco.CmsNuGet |
15.0.0 up to 15.1.2, plus listed versions 15.1.015.1.0-rc15.1.0-rc215.1.1 |
15.1.2 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | Puben/CVE-2025-24011-PoC | 2025-03-21 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-24011 is a medium vulnerability (CVSS 5.3) in Umbraco Cms, published January 21, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.61%, the 76th percentile. Fixed in Umbraco.Cms 14.3.2.
References
github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-hmg4-wwm5-p999
nvd.nist.gov/vuln/detail/CVE-2025-24011