cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
An issue was discovered in cPanel before 11.109.9999.116. XSS can occur on the cpsrvd error page via an invalid webcall ID, aka SEC-669. The fixed versions are 11.109.9999.116, 11.108.0.13, 11.106.0.18, and 11.102.0.31.