XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. If guest has view right on any document. It's possible to create a new user using the `distribution/firstadminuser.wiki` in the wrong context. This vulnerability has been patched in XWiki 15.0-rc-1 and 14.10.1. There is no known workaround other than upgrading.

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

Уязвимость платформы создания совместных веб-приложений XWiki Platform XWiki, связанная с недостатками контроля доступа, позволяющая нарушителю создать нового пользователя