| Package | Affected versions | Patched versions |
|---|---|---|
| org.xwiki.platform:xwiki-platform-mentions-ui | ≥ 12.5-rc-1, < 13.10.6≥ 14.0, < 14.4 | 13.10.614.4 |
| xwiki | ≥ 12.5, < 13.10.6≥ 14.0, < 14.4 | 13.10.614.4 |
It's possible to store Javascript or groovy scripts in an mention macro anchor or reference field. The stored code is executed by anyone visiting the page with the mention.
For example, the example below will create a file at /tmp/exploit.txt:
{{mention reference="XWiki.Translation" anchor="{{/html~}~}{{async async=~"true~" cached=~"false~" context=~"doc.reference~"~}~}{{groovy~}~}new File(~"/tmp/exploit.txt~").withWriter { out -> out.println(~"owned!~"); }{{/groovy~}~}{{/async~}~}"/}}
This issue has been patched on XWiki 14.4 and 13.10.6.
It's possible to fix the vulnerability by updating XWiki.Mentions.MentionsMacro and edit the Macro code field of the XWiki.WikiMacroClass XObject.
<a id="$anchor" class="$stringtool.join($cssClasses, ' ')" data-reference="$services.model.serialize($reference.reference, 'default')" href="$link">$content</a>
Must be replaced by
<a id="$escapetool.xml($anchor)" class="$stringtool.join($cssClasses, ' ')" data-reference="$escapetool.xml($services.model.serialize($reference.reference, 'default'))" href="$escapetool.xml($link)">
$escapetool.xml($content)
</a>
See the patches:
If you have any questions or comments about this advisory:
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