GHSA-7x74-h8cw-qhxq
Brute force exploit can be used to collect valid usernames
Quick fix
GHSA-7x74-h8cw-qhxq — Umbraco.CMS: upgrade to the fixed version with the command below.
dotnet add package Umbraco.CMS --version 8.18.10Details
#### Impact A brute force exploit that can be used to collect valid usernames is possible.
#### Explanation of the vulnerability It's a brute force exploit that can be used to collect valid usernames by using the “forgot password” function when trying to log into the Backoffice. If the username/email is known, it is easier to find the corresponding password. If an email address that was already used and registered by a user, is provided as an input, the server internal processing time takes longer. If the email address does not exist in the database of the registered users, the server would respond immediately.
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Affected packages
8.0.0Fixed in: 8.18.10dotnet add package Umbraco.CMS --version 8.18.109.0.0Fixed in: 10.8.1dotnet add package Umbraco.CMS --version 10.8.111.0.0Fixed in: 12.3.4dotnet add package Umbraco.CMS --version 12.3.4