CVE-2015-7816: Matomo

High severity, CVSS 7.5. EPSS: 3.9% chance of exploitation in the next 30 days.

The DisplayTopKeywords function in plugins/Referrers/Controller.php in Piwik before 2.15.0 allows remote attackers to conduct PHP object injection attacks, conduct Server-Side Request Forgery (SSRF) attacks, and execute arbitrary PHP code via a crafted HTTP header.

Affected products

• Matomo Matomo: up to and including 2.14.3

Published 2015-11-16. Last modified 2026-06-17.