An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a user enumeration vulnerability, allowing an unauthenticated attacker to determine with certainty if an account exists for a given username.

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. Certain HTTP security headers are not used.

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. CSRF can be used to send API requests.

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. The server allows remote code execution. Administrative users could upload an unsigned extension ZIP file containing executable code that is subsequently executed by the server.

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is stored XSS in the Appearance modifier.

An issue was discovered in ConnectWise Control (formerly known as ScreenConnect) 19.3.25270.7185. There is a CORS misconfiguration, which reflected the Origin provided by incoming requests. This allowed JavaScript running on any domain to interact with the server APIs and perform administrative actions, without the victim's knowledge.