CVE-2025-46736 Umbraco Makes User Enumeration Feasible Based on Timing of Login Response
Attackers can enumerate valid user accounts by analyzing login response timing, exposing user existence information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-46736?
CVE-2025-46736 is a medium-severity vulnerability in Umbraco Umbraco Cms, published on 6 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-204
Which versions are affected by CVE-2025-46736?
4 open source packages ship an affected version, including Umbraco.Cms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Umbraco.Cms NuGet | All versions | 10.8.10 |
Umbraco.Cms NuGet | All versions | 10.8.10 |
Umbraco.Cms NuGet | From 11.0.0-rc1 | 13.8.1 |
Umbraco.Cms NuGet | From 11.0.0-rc1 | 13.8.1 |
Products include Umbraco Umbraco Cms.
How do I fix CVE-2025-46736?
Upgrade Umbraco.Cms to a fixed version for your release line: 10.8.10 or 13.8.1.
Is CVE-2025-46736 being exploited?
There is no known exploitation of CVE-2025-46736 in the wild and no public exploit code.
Other vulnerabilities in Umbraco Umbraco Cms
- CVE-2025-67288 Umbraco CMS has an arbitrary file upload vulnerability
- CVE-2014-10074 File upload in n/a
- CVE-2012-1301 Server-side request forgery in n/a
- CVE-2012-10054 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE
- CVE-2025-32017 Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users
Sources
Also known as GHSA-4g8m-5mj5-c8xg.