Impact On instances where Extension Repository Application is installed, any user can execute any code requiring programming rights on the server. In order to reproduce on an instance, as a normal user without script nor programming rights, go to your profile and add an object of type ExtensionCode.ExtensionClass. Set the description to {{async}}{{groovy}}println("Hello from Description"){{/groovy}}{{/async}} and press Save and View. If the description displays as Hello from Description without any error, then the instance is vulnerable.
Patches This vulnerability has been fixed in XWiki 15.10.9 and 16.3.0.
Workarounds Since Extension Repository Application is not mandatory, it can be safely disabled on instances that do not use it. It is also possible to manually apply this patch to the page ExtensionCode.ExtensionSheet, as well as this patch to the page ExtensionCode.ExtensionAuthorsDisplayer.
References https://jira.xwiki.org/browse/XWIKI-21890 https://github.com/xwiki/xwiki-platform/commit/8659f17d500522bf33595e402391592a35a162e8
For more information
If you have any questions or comments about this advisory: Open an issue in Jira XWiki.org Email us at Security Mailing List
XWiki Platform is a generic wiki platform. Starting in version 3.2-m3, users can deduce the content of the password fields by repeated call to LiveTableResults and WikisLiveTableResultsMacros. The issue can be fixed by upgrading to versions 14.7-rc-1, 13.4.4, or 13.10.9 and higher, or in version >= 3.2M3 by applying the patch manually on LiveTableResults and WikisLiveTableResultsMacros.
Impact
In XWiki Platform, it's possible for a user to write a script in which any velocity content is executed with the right of any other document content author.
To reproduce:
As a user with script but not programming right, create a document with the following content:
{{velocity}} #set($main = $xwiki.getDocument('AppWithinMinutes.DynamicMessageTool')) $main.setTitle('$doc.getDocument().getContentAuthor()') $main.getPlainTitle() {{/velocity}}
Since this API require programming right and the user does not have it, the expected result is $doc.document.authors.contentAuthor (not executed script), unfortunately with the security vulnerability we get XWiki.superadmin which shows that the title was executed with the right of the unmodified document.
Patches
This has been patched in XWiki 14.10.7 and 15.2-RC-1.
Workarounds
There are no known workarounds for it.
References
https://jira.xwiki.org/browse/XWIKI-20624 https://github.com/xwiki/xwiki-platform/commit/11a9170dfe63e59f4066db67f84dbfce4ed619c6 https://jira.xwiki.org/browse/XWIKI-20625 https://github.com/xwiki/xwiki-platform/commit/41d7dca2d30084966ca6a7ee537f39ee8354a7e3
For more information
If you have any questions or comments about this advisory: Open an issue in Jira XWiki.org Email us at Security Mailing List