Description
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Starting in version 2.2.1 until versions 14.4.8, 14.10.5, and 15.1RC1 of org.xwiki.platform:xwiki-platform-web and any version prior to 14.4.8, 14.10.5, and 15.1.RC1 of org.xwiki.platform:xwiki-platform-web-templates, any user who can edit a document in a wiki like the user profile can create a stored cross-site scripting attack. The attack occurs by putting plain HTML code into that document and then tricking another user to visit that document with the `displaycontent` or `rendercontent` template and plain output syntax. If a user with programming rights is tricked into visiting such a URL, arbitrary actions be performed with this user's rights, impacting the confidentiality, integrity, and availability of the whole XWiki installation. This has been patched in XWiki 14.4.8, 14.10.5 and 15.1RC1 by setting the content type of the response to plain text when the output syntax is not an HTML syntax.
Remediation
References
https://github.com/xwiki/xwiki-platform/commit/53e8292a31ec70fba5e1d705a4ac443658b9e6df
https://jira.xwiki.org/browse/XWIKI-20290
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-fp7h-f9f5-x4q7
Related Vulnerabilities
CVE-2020-26226 Vulnerability in npm package semantic-release
CVE-2021-37695 Vulnerability in maven package org.webjars.bowergithub.ckeditor:ckeditor4
CVE-2017-7525 Vulnerability in maven package com.fasterxml.jackson.core:jackson-databind
CVE-2018-20676 Vulnerability in maven package org.webjars.bower:bootstrap-sass