CVE-2018-1270, which permitted a malicious user to craft a STOMP message that could lead to remote code execution, was not fully addressed in the 4.3.x branch of the Spring Framework.

Pivotal Spring Framework could allow a remote attacker to execute arbitrary code on the system, caused by the exposure of STOMP over WebSocket endpoints with a STOMP broker through the spring-messaging module. By sending a specially-crafted message, an attacker could exploit this vulnerability to execute arbitrary code on the system.