CVE-2017-5541: Getsymphony Symphony

Medium severity, CVSS 5.3. EPSS: 2.5% chance of exploitation in the next 30 days.

Directory traversal vulnerability in template/usererror.missing_extension.php in Symphony CMS before 2.6.10 allows remote attackers to rename arbitrary files via a .. (dot dot) in the existing-folder and new-folder parameters.

Affected products

• Getsymphony Symphony: up to and including 2.6.9

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