Impact
We found a possible XSS vector in the Filter.FilterStreamDescriptorForm
wiki page related to pretty much all the form fields printed in the home page of the application.
Patches
The issue is patched in versions 12.10.11, 14.0-rc-1, 13.4.7, 13.10.3.
Workarounds
The easiest workaround is to edit the wiki page Filter.FilterStreamDescriptorForm
(with wiki editor) and change the lines
<input type="text" id="$descriptorId" name="$descriptorId" value="#if($request.get($descriptorId))$request.get($descriptorId)#else$descriptor.defaultValue#end"/>
#else
<input type="text" id="$descriptorId" name="$descriptorId"#if($request.get($descriptorId))value="$request.get($descriptorId)"#end/>
into
<input type="text" id="$descriptorId" name="$descriptorId" value="#if($request.get($descriptorId))$escapetool.xml($request.get($descriptorId))#else$descriptor.defaultValue#end"/>
#else
<input type="text" id="$descriptorId" name="$descriptorId"#if($request.get($descriptorId))value="$escapetool.xml($request.get($descriptorId))"#end/>
References
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-xjfw-5vv5-vjq2
- https://nvd.nist.gov/vuln/detail/CVE-2022-29258
- https://github.com/xwiki/xwiki-platform/commit/21906acb5ee2304552f56f9bbdbf8e7d368f7f3a
- https://jira.xwiki.org/browse/XWIKI-19293
- https://github.com/advisories/GHSA-xjfw-5vv5-vjq2