Code Injection in XWiki Platform

The impact of CVE-2020-11057 is severe. An attacker can leverage this vulnerability to execute arbitrary code on the XWiki server with the privileges of the user editing the dashboard. This could lead to data exfiltration, system takeover, and potentially lateral movement within the network if the XWiki server has access to other resources. The ability to execute arbitrary code opens the door to a wide range of malicious activities, including installing malware, modifying data, and disrupting services. The ease of exploitation, requiring only a registered user account, significantly expands the potential attack surface.

Organizations using XWiki Platform in environments where user dashboards are extensively used and where users have been granted permissions that allow script execution are particularly at risk. Shared hosting environments where multiple users share the same XWiki instance are also vulnerable, as a compromised user account could potentially impact other users.

• java / server:

ps -ef | grep -i xwiki

• java / server:

journalctl -u xwiki -f | grep -i "script execution"

• generic web:

curl -I <xwiki_url>/xwiki/bin/view/Main/Dashboard

• generic web: Check XWiki server logs for unusual script execution attempts or errors related to script parsing.

1. 2020-05-12Disclosure

   disclosure

2. 2020-05-12Patch

   patch

1. Reserviert2020-03-30
2. Veröffentlicht2020-05-12
3. Geändert2024-08-04
4. EPSS aktualisiert2026-04-02

The primary mitigation for CVE-2020-11057 is to upgrade XWiki Platform to version 11.10.3 or later, or to version 12.0. If immediate upgrading is not possible, consider restricting user permissions to prevent script execution within dashboards. Implement strict input validation and sanitization on all user-supplied data. Review existing dashboards for any suspicious scripts. After upgrading, verify the fix by attempting to execute a script within a user's dashboard with a non-privileged account; the script should be rejected.