Description
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Simple users can create global SSX/JSX without specific rights: in theory only users with Programming Rights should be allowed to create SSX or JSX that are executed everywhere on a wiki. But a bug allow anyone with edit rights to actually create those. This issue has been patched in XWiki 13.10-rc-1, 12.10.11 and 13.4.6. There's no easy workaround for this issue, administrators should upgrade their wiki.
Remediation
References
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-ghcq-472w-vf4h
https://jira.xwiki.org/browse/XWIKI-19155
Related Vulnerabilities
CVE-2019-13000 Vulnerability in maven package fr.acinq.eclair:eclair-core_2.11
CVE-2021-43306 Vulnerability in maven package org.webjars:jquery-validation
CVE-2019-19771 Vulnerability in npm package hw-trnasport-u2f
CVE-2017-16105 Vulnerability in npm package serverwzl
CVE-2020-9484 Vulnerability in maven package org.apache.tomcat:tomcat-catalina