org.xwiki.platform:xwiki-platform-notifications-ui leaks data of notification filters of users
It's possible to get access to notification filters of any user by using a URL such as <hostname>xwiki/bin/get/XWiki/Notifications/Code/NotificationFilterPreferenceLivetableResults?outputSyntax=plain&type=custom&user=<username>. This vulnerability impacts all versions of XWiki since 13.2-rc-1. The filters do not provide much information (they mainly contain references which are public data in XWiki), though some info could be used in combination with other vulnerabilities.