Code injection through NotificationRSSService in XWiki Platform

Summary

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user who can edit their own user profile and notification settings can execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. This has been patched in XWiki 14.10.6 and 15.2RC1. Users are advised to update. As a workaround the main security fix can be manually applied by patching the affected document `XWiki.Notifications.Code.NotificationRSSService`. This will break the link to the differences, though as this requires additional changes to Velocity templates as shown in the patch. While the default template is available in the instance and can be easily patched, the template for mentions is contained in a `.jar`-file and thus cannot be fixed without replacing that jar.

Timeline

1. Jun 29, 2023, 8:38 PM UTCCVE published
2. Nov 26, 2024, 7:14 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: no · Technical impact: total

3. Nov 26, 2024, 7:14 PM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• xwiki xwiki-platform

  From 9.6-rc-1 · fixed in 14.10.6; From 15.0-rc-1 · fixed in 15.2-rc-1

• org.xwiki.platform:xwiki-platform-notifications-uiMaven

  From 9.6-rc-1 · fixed in 14.10.6

• org.xwiki.platform:xwiki-platform-notifications-uiMaven

  From 15.0-rc-1 · fixed in 15.2-rc-1

References 5