On SharePoint 2013, there is a content search webpart that is displaying all the blogposts from all sites. There is a particular user that his posts are not showing up in the webpart. All the rest authors have no issues in the webpart. The query:
contentclass:STS_ListItem_Posts and -Title="Welcome to my blog!"
It seems that this user has the appropriate permissions. His posts have been approved.
The content of the posts has been crawled and I have executed a full crawl to make sure that the content is being actually crawled. The only thing I haven't tried yet, is index reset.
The permission set of the user: