XWiki Commons are technical libraries common to several other top level XWiki projects. A user without script rights can introduce a stored XSS by using the Live Data macro, if the last author of the content of the page has script rights. This has been patched in XWiki 14.10, 14.4.7, and 13.10.11.
https://jira.xwiki.org/browse/XWIKI-20312
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-hmm7-6ph9-8jf2