Impact

It's possible to execute anything with the right of the Scheduler Application sheet page.

To reproduce:

1. As a user without script or programming rights, edit your user profile with the object editor and add a new object of type XWiki.SchedulerJobClass (search for "Scheduler")
2. In "Job Script", add the following
   {{/code}} {{async async="true" cached="false" context="doc.reference"}}{{groovy}}println("Hello " + "from groovy!"){{/groovy} {{/async}}
3. Click "Save & View"
4. If the job information isn't already displayed (you should see "Job Name", "Job Description", etc.), append ?sheet=XWiki.SchedulerJobSheet to the URL.

Patches

This has been patched in XWiki 14.10.3 and 15.0 RC1.

Workarounds

While the fix in the scheduler itself is easy, it relies on the code macro source parameter, which was introduced in 14.10.2 so you have to upgrade to benefit from it.

References

https://jira.xwiki.org/browse/XWIKI-20295
https://jira.xwiki.org/browse/XWIKI-20462

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

References

• GHSA-fc42-5w56-qw7h
• https://nvd.nist.gov/vuln/detail/CVE-2023-29524
• https://jira.xwiki.org/browse/XWIKI-20295
• https://jira.xwiki.org/browse/XWIKI-20462