CVE-2011-0401: Matomo

Medium severity, CVSS 5.0. EPSS: 1.7% chance of exploitation in the next 30 days.

Piwik before 1.1 does not properly limit the number of files stored under tmp/sessions/, which might allow remote attackers to cause a denial of service (inode consumption) by establishing many sessions.

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.