YUNUCMS 1.1.8 has XSS in app/admin/controller/System.php because crafted data can be written to the sys.php file, as demonstrated by site_title in an admin/system/basic POST request.
Severity
CVSS 3.0
6.1 medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)