CVE-2021-3243: Wfiltericf Wfilter Internet Content Filter

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Wfilter ICF 5.0.117 contains a cross-site scripting (XSS) vulnerability. An attacker in the same LAN can craft a packet with a malicious User-Agent header to inject a payload in its logs, where an attacker can take over the system by through its plugin-running function.

Affected products

• Wfiltericf Wfilter Internet Content Filter: version 5.0.117 only

Published 2021-04-15. Last modified 2026-06-17.