cPanel through 74 allows XSS via a crafted filename in the logs subdirectory of a user account, because the filename is mishandled during frontend/THEME/raw/index.html rendering.
The WHM Upload Locale interface in cPanel before 56.0.51, 58.x before 58.0.52, 60.x before 60.0.45, 62.x before 62.0.27, 64.x before 64.0.33, and 66.x before 66.0.2 has XSS via a locale filename, aka SEC-297.
Cross-site scripting (XSS) vulnerability in cgiemail and cgiecho allows remote attackers to inject arbitrary web script or HTML via the addendum parameter.