Disabling a user account changes its author, allowing RCE from user account in XWiki

Summary

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. When an admin disables a user account, the user's profile is executed with the admin's rights. This allows a user to place malicious code in the user profile before getting an admin to disable the user account. To reproduce, as a user without script nor programming rights, edit the about section of your user profile and add `{{groovy}}services.logging.getLogger("attacker").error("Hello from Groovy!"){{/groovy}}`. As an admin, go to the user profile and click the "Disable this account" button. Then, reload the page. If the logs show `attacker - Hello from Groovy!` then the instance is vulnerable. This has been patched in XWiki 14.10.21, 15.5.5, 15.10.6 and 16.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. Workarounds We're not aware of any workaround except upgrading. References • https://jira.xwiki.org/browse/XWIKI-21611 • https://github.com/xwiki/xwiki-platform/commit/f89c8f47fad6e5cc7e68c69a7e0acde07f5eed5a

Timeline

1. Jun 20, 2024, 10:13 PM UTCCVE published
2. Jun 27, 2024, 6:36 PM UTCCISA SSVC assessment

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

3. Aug 13, 2024, 1:51 PM UTCRecord last updated

Affected versions

• xwiki xwiki-platform

  From 13.4.7 · through 13.5; From 13.10.3 · fixed in 14.10.21; From 15.0-rc-1 · fixed in 15.5.5; From 15.6-rc-1 · fixed in 15.10.6; From 16.0.0-rc-1 · fixed in 16.0.0

• org.xwiki.platform:xwiki-platform-oldcoreMaven

  From 13.4.7 · fixed in 14.10.21

• org.xwiki.platform:xwiki-platform-oldcoreMaven

  From 13.10.3 · fixed in 14.10.21

• org.xwiki.platform:xwiki-platform-oldcoreMaven

  From 15.0-rc-1 · fixed in 15.5.5

• org.xwiki.platform:xwiki-platform-oldcoreMaven

  From 15.6-rc-1 · fixed in 15.10.6

• org.xwiki.platform:xwiki-platform-oldcoreMaven

  From 16.0.0-rc-1 · fixed in 16.0.0

References 3