Impact Users are able to forge an URL with a payload allowing to inject Javascript in the page (XSS). It's possible to exploit the deletespace template to perform a XSS, e.g. by using URL such as:

xwiki/bin/deletespace/Sandbox/?xredirect=javascript:alert(document.domain)

This vulnerability exists since XWiki 3.4-milestone-1.

Patches The vulnerability has been patched in XWiki 14.10.5 and 15.1-rc-1.

Workarounds

It's possible to workaround the vulnerability by editing the template deletespace.vm to perform checks on it, but note that the appropriate fix involves new APIs that have been recently introduced in XWiki. See the referenced jira tickets.

References

Jira ticket about the vulnerability: https://jira.xwiki.org/browse/XWIKI-20612 Introduction of the macro used for fixing all those vulnerabilities: https://jira.xwiki.org/browse/XWIKI-20583 Commit containing the actual fix in the template: https://github.com/xwiki/xwiki-platform/commit/5c20ff5e3bdea50f1053fe99a27e011b8d0e4b34

For more information

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