In cPanel before 66.0.2, the Apache HTTP Server configuration file is changed to world-readable when rebuilt (SEC-274).

In cPanel before 66.0.2, domain log files become readable after log processing (SEC-273).

cPanel before 66.0.2 allows demo accounts to create databases and users (SEC-271).

In cPanel before 66.0.2, the cpdavderrorlog file can be created with weak permissions (SEC-280).

In cPanel before 66.0.2, EasyApache 4 conversion sets weak domlog ownership and permissions (SEC-272).

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.