Symphony CMS XSS Vulnerabilities
Date: 2022-05
Affected: composer/symphonycms/symphony-2
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2015-8766
CWE: CWE-79
CVSS: 6.1 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

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.


Mitigations:

Architectural layers (MAESTRO):