CVE-2009-1070: Expressionengine

Medium severity, CVSS 4.3. EPSS: 1.7% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in system/index.php in ExpressionEngine 1.6.4 through 1.6.6, and possibly earlier versions, allows remote attackers to inject arbitrary web script or HTML via the avatar parameter.

Affected products

• Expressionengine Expressionengine: version 1.6.4 only; version 1.6.5 only; version 1.6.6 only

Published 2009-03-26. Last modified 2026-06-16.