GHSA-fp36-mjw5-fmgx xwiki-platform-web-templates allows users to be created even when registration is disabled without validation via template macro

• Maven org.xwiki.platform:xwiki-platform-web-templates: >= 8.0-rc-1, < 14.10.1 → fixed in 14.10.1

Impact If a guest has view rights on any document, it's possible to create a new user using the `distribution/firstadminuser.wiki` in the wrong context. To reproduce: • On a wiki with view rights for guests but user registration disabled, open as guest /xwiki/bin/view/Main?sheet=CKEditor.HTMLConverter&language=en&sourceSyntax=xwiki%2F2.1&stripHTMLEnvelope=true&fromHTML=false&toHTML=true&text=%7B%7Btemplate+name%3D%22distribution%2Ffirstadminuser.wiki%22+%2F%7D%7D where is the URL of your XWiki installation. • Enter username and password of your choice. • Click "Register and login" Patches The vulnerability has been patched in XWiki 15.0-rc-1 and 14.10.1. Workarounds There is no known workaround other than upgrading. References https://jira.xwiki.org/browse/XWIKI-19852 https://jira.xwiki.org/browse/XWIKI-20400 For more information If you have any questions or comments about this advisory: • Open an issue in Jira XWiki.org • Email us at Security Mailing List