CVE-2015-8766: Getsymphony Symphony

Medium severity, CVSS 6.1. EPSS: 1.8% chance of exploitation in the next 30 days.

Multiple cross-site scripting (XSS) vulnerabilities in content/content.systempreferences.php in Symphony CMS before 2.6.4 allow remote attackers to inject arbitrary web script or HTML via the (1) email_sendmail[from_name], (2) email_sendmail[from_address], (3) email_smtp[from_name], (4) email_smtp[from_address], (5) email_smtp[host], (6) email_smtp[port], (7) jit_image_manipulation[trusted_external_sites], or (8) maintenance_mode[ip_whitelist] parameters to system/preferences.

Affected products

• Getsymphony Symphony: up to and including 2.6.3

Published 2016-01-08. Last modified 2026-06-17.