Xibo CMS: Remote Code Execution durch Modulvorlagen

An attacker exploiting this vulnerability could gain complete control over the Xibo CMS server. This could lead to data breaches, system compromise, and the potential for lateral movement within the network. The attacker would need to be an authenticated user with the "System -> Add/Edit custom modules and templates" permission. Successful exploitation involves manipulating Twig filters within the module templating system to execute arbitrary server-side functions. Given Xibo's use in digital signage deployments, attackers could potentially manipulate displayed content or gain access to sensitive data stored within the CMS.

Organizations utilizing Xibo CMS for digital signage deployments, particularly those running versions 4.3.0 or earlier, are at risk. Shared hosting environments where multiple users have access to CMS configuration are especially vulnerable, as is any deployment with overly permissive user roles.

• linux / server: Monitor Xibo CMS logs for unusual Twig filter usage or attempts to execute arbitrary code. Use journalctl -f to monitor CMS logs in real-time.

journalctl -f -u xibo-cms

• php: Check for unauthorized modifications to module templates within the Xibo CMS installation directory.

find /var/www/xibo/ -name '*.twig' -mtime -7

• generic web: Examine access logs for requests containing suspicious Twig filter parameters. Use grep to search for patterns indicative of exploitation attempts.

grep -i 'twig|filter' /var/log/apache2/access.log

1. 2025-11-04Disclosure

   disclosure

1. Reserviert2025-10-10
2. Veröffentlicht2025-11-04
3. Geändert2025-11-05
4. EPSS aktualisiert2026-03-23

The primary mitigation is to upgrade Xibo CMS to version 4.3.1 or later, which contains the fix for this vulnerability. If upgrading immediately is not possible, apply the patch commits from versions 4.1 and 4.2 as a temporary workaround. These commits address the underlying issue. Review user permissions to ensure that only authorized personnel have access to the "System -> Add/Edit custom modules and templates" functionality. Consider implementing a Web Application Firewall (WAF) with rules to detect and block malicious attempts to manipulate Twig filters.