CVE-2011-0398: Matomo

Medium severity, CVSS 6.4. EPSS: 1.3% chance of exploitation in the next 30 days.

The Piwik_Common::getIP function in Piwik before 1.1 does not properly determine the client IP address, which allows remote attackers to bypass intended geolocation and logging functionality via (1) use of a private (aka RFC 1918) address behind a proxy server or (2) spoofing of the X-Forwarded-For HTTP header.

Affected products

• Matomo Matomo: up to and including 1.0; version 0.1 only; version 0.1.1 only; version 0.1.2 only; version 0.1.3 only; version 0.1.4 only; …

Published 2011-01-10. Last modified 2026-06-16.