CVE-2011-0400: Matomo

Medium severity, CVSS 5.0. EPSS: 1.3% chance of exploitation in the next 30 days.

Cookie.php in Piwik before 1.1 does not set the secure flag for the session cookie in an https session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an http session.

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.