CVE-2011-2904: Zabbix

Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in acknow.php in Zabbix before 1.8.6 allows remote attackers to inject arbitrary web script or HTML via the backurl parameter.

Affected products

• Zabbix Zabbix: up to and including 1.8.5; version 1.1 only; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; version 1.1.4 only; …

Published 2011-08-19. Last modified 2026-06-16.