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.
Scores
CVSS v3
5.3
EPSS
0.0031
EPSS Percentile
53.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-204
Status
published
Products (2)
nuget/Umbraco.Cms
11.0.0-rc1 - 13.8.1NuGet
umbraco/umbraco_cms
< 10.8.10
Published
May 06, 2025
Tracked Since
Feb 18, 2026