Maven extensions not fetching because of non authenticated user

I have a maven project with takari smart builder extension located in .mvn/extensions.xml.
When I run mvn clean install I get the following error :
Downloading: http://XXX/artifactory/plugins-release/io/takari/maven/takari-smart-builder/0.4.0/takari-smart-builder-0.4.0.pom
Downloading: http://XXXX/artifactory/plugins-snapshot/io/takari/maven/takari-smart-builder/0.4.0/takari-smart-builder-0.4.0.pom
[WARNING] Failed to read extensions descriptor /Users/thomascollignon/Documents/Workspace_eclipse/neo/.mvn/extensions.xml: Plugin io.takari.maven:takari-smart-builder:0.4.0 or one of its dependencies could not be resolved: Failed to read artifact descriptor for io.takari.maven:takari-smart-builder:jar:0.4.0

And In artifactory log :
20150322230957|1|REQUEST|192.168.0.1|non_authenticated_user|HEAD|/plugins-release/io/takari/maven/takari-smart-builder/0.4.0/takari-smart-builder-0.4.0.pom|HTTP/1.1|401|0
20150322230957|0|REQUEST|192.168.0.1|non_authenticated_user|HEAD|/plugins-snapshot/io/takari/maven/takari-smart-builder/0.4.0/takari-smart-builder-0.4.0.pom|HTTP/1.1|401|0

If I switch to no profile in settings.xml to have direct link to Maven central, It works.

This little project show the problem, if using maven settings.xml file included : https://github.com/tcollignon/neoLight
Do you think it's maven problem, or artifactory problem?