Description
XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions it's possible for a user to execute any content with the right of an existing document's content author, provided the user have edit right on it. A crafted URL of the form ` /xwiki/bin/edit//?content=%7B%7Bgroovy%7D%7Dprintln%28%22Hello+from+Groovy%21%22%29%7B%7B%2Fgroovy%7D%7D&xpage=view` can be used to execute arbitrary groovy code on the server. This vulnerability has been patched in XWiki versions 14.10.6 and 15.2RC1. Users are advised to update. There are no known workarounds for this issue.
Remediation
References
https://github.com/xwiki/xwiki-platform/commit/a0e6ca083b36be6f183b9af33ae735c1e02010f4
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-g2qq-c5j9-5w5w
https://jira.xwiki.org/browse/XWIKI-20385
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