GHSA-m2r5-4w96-qxg5 Arbitrary file access through XML parsing in org.xwiki.commons:xwiki-commons-xml

• Maven org.xwiki.commons:xwiki-commons-xml: >= 2.7, < 12.10.10 → fixed in 12.10.10 • Maven org.xwiki.commons:xwiki-commons-xml: >= 13.0.0, < 13.4.4 → fixed in 13.4.4 • Maven org.xwiki.commons:xwiki-commons-xml: >= 13.5-rc-1, < 13.8-rc-1 → fixed in 13.8-rc-1

Impact It's possible in a script to access any file accessing to the user running XWiki application server with XML External Entity Injection through the XML script service. For example: ``` {{velocity}} set($xml=$services.get('xml')) set($xxe_payload = "]>&xxe;") set($doc=$xml.parse($xxe_payload)) $xml.serialize($doc) {{/velocity}} ``` Patches The problem has been patched on versions 12.10.10, 13.4.4 and 13.8RC1. Workarounds There's no easy workaround for fixing this vulnerability other than upgrading and being careful when giving Script rights. References https://jira.xwiki.org/browse/XWIKI-18946 For more information If you have any questions or comments about this advisory: • Open an issue in Jira XWiki • Email us at XWiki Security mailing-list