org.xwiki.platform:xwiki-platform-oldcore may leak data through deleted and re-created documents
Moderate severity
GitHub Reviewed
Published
Oct 25, 2023
in
xwiki/xwiki-platform
•
Updated Nov 10, 2023
Package
Affected versions
>= 9.4-rc-1, < 14.10.8
>= 15.0-rc-1, < 15.3-rc-1
Patched versions
14.10.8
15.3-rc-1
Description
Published by the National Vulnerability Database
Oct 25, 2023
Published to the GitHub Advisory Database
Oct 25, 2023
Reviewed
Oct 25, 2023
Last updated
Nov 10, 2023
Impact
When a document has been deleted and re-created, it is possible for users with view right on the re-created document but not on the deleted document to view the contents of the deleted document. Such a situation might arise when rights were added to the deleted document. This can be exploited through the diff feature and, partially, through the REST API by using versions such as
deleted:1(where the number counts the deletions in the wiki and is thus guessable). Given sufficient rights, the attacker can also re-create the deleted document, thus extending the scope to any deleted document as long as the attacker has edit right in the location of the deleted document.Patches
This vulnerability has been patched in XWiki 14.10.8 and 15.3 RC1 by properly checking rights when deleted revisions of a document are accessed.
Workarounds
The only workaround is to regularly clean deleted documents to minimize the potential exposure. Extra care should be taken when deleting sensitive documents that are protected individually (and not, e.g., by being placed in a protected space) or deleting a protected space as a whole.
References
References