Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') in org.xwiki.platform:xwiki-platform-skin-ui

Summary

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Improper escaping in the document `SkinsCode.XWikiSkinsSheet` leads to an injection vector from view right on that document to programming rights, or in other words, it is possible to execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. The attack works by opening a non-existing page with a name crafted to contain a dangerous payload. It is possible to check if an existing installation is vulnerable. See the linked GHSA for instructions on testing an installation. This issue has been patched in XWiki 14.4.8, 14.10.4 and 15.0-rc-1. Users are advised to upgrade. The fix commit `d9c88ddc` can also be applied manually to the impacted document `SkinsCode.XWikiSkinsSheet` and users unable to upgrade are advised to manually patch their installations.

Timeline

1. Jul 14, 2023, 8:39 PM UTCCVE published
2. Oct 30, 2024, 6:31 PM UTCCISA SSVC assessment

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

3. Oct 30, 2024, 6:31 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 7.0-rc-1 · fixed in 14.4.8; From 14.5 · fixed in 14.10.4

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

  From 7.0-rc-1 · fixed in 14.4.8

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

  From 14.5 · fixed in 14.10.4

References 4