CVE-2025-46736 json
Umbraco Makes User Enumeration Feasible Based on Timing of Login Response
published 2025-05-06 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-13623 , GHSA-4g8m-5mj5-c8xg
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
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.
Patch / fix
- nuget Umbraco.Cms 10.8.10, 13.8.1
- umbraco umbraco_cms 10.8.10, 13.8.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Umbraco.Cms | >=11.0.0-rc1, <13.8.1 <10.8.10 |
13.8.1 10.8.10 |
Affected products
- umbraco Umbraco-CMS
Classification
- Weakness
-
- CWE-204 Observable Response Discrepancy
References
-
github.com
/umbraco/Umbraco-CMS/commit/14fbd20665b453cbf094ccf4575b79a9fba07e03
web, patch
-
github.com
/umbraco/Umbraco-CMS/commit/34709be6cce9752dfa767dffbf551305f48839bc
web, patch
-
github.com
/umbraco/Umbraco-CMS/security/advisories/GHSA-4g8m-5mj5-c8xg
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-46736
advisory
-
github.com
/umbraco/Umbraco-CMS
package
Sources
- CVE List CVE-2025-46736
- GitHub Advisory GHSA-4g8m-5mj5-c8xg
- NVD CVE-2025-46736
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.