CVE-2017-5542: Getsymphony Symphony

Medium severity, CVSS 6.1. EPSS: 1.2% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in template/usererror.missing_extension.php in Symphony CMS before 2.6.10 allows remote attackers to inject arbitrary web script or HTML via the existing-folder parameter.

Affected products

• Getsymphony Symphony: up to and including 2.6.9

Published 2017-01-20. Last modified 2026-06-17.