Headline
CVE-2023-29212: Privilege escalation (PR) from account through IncludedPagesDocumentInformation panel
XWiki Commons are technical libraries common to several other top level XWiki projects. Any user with edit rights can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the included pages in the included documents edit panel. The problem has been patched on XWiki 14.4.7, and 14.10.
Steps to reproduce:
As a user without script or programming right open your user account (or any other document you can edit with the wiki editor.
Set the content to
{{display reference="{{cache~}~}{{groovy~}~}println(~"Hello from Groovy~" + ~" in included document!~"){{/groovy~}~}{{/cache~}~}"/}}
.
Click “Save”
Refresh the document in the browser.
Expected result:
The panel at the right of the editor displays
One included page: {{cache}}{{groovy}}println(“Hello from Groovy” + " in included document!"){{/groovy}}{{/cache}}
.
Actual result:
The panel displays the text
One included page: XWiki.Hello from Groovy in included document!
This demonstrates a privilege escalation from simple user account to programming rights.
Related news
### Impact Any user with edit rights can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the included pages in the included documents edit panel. A proof of concept exploit is to edit a document and add the following code before saving. ``` {{display reference="{{cache~}~}{{groovy~}~}println(~"Hello from Groovy~" + ~" in included document!~"){{/groovy~}~}{{/cache~}~}"/}} ``` **expected** The right had side panels contain: ``` One included page: {{cache}}{{groovy}}println("Hello from Groovy" + " in included document!"){{/groovy}}{{/cache}} ``` **actual** The right had side panels contain: ``` One included page: XWiki.Hello from Groovy in included document! ``` ### Patches The problem has been patched on XWiki 14.4.7, and 14.10. ### Workarounds The issue can be fixed manually applying this [patch](https://github.com/xwiki/xwiki-platform/commit/22f249a0eb9f2a64214628217e812a994419...