Pivotal Spring Security and Spring Framework could allow a remote attacker to bypass security restrictions, caused by the failure to consider URL path parameters when processing security constraints. By adding a URL path parameter with special encodings, an attacker could exploit this vulnerability to bypass access restrictions and gain access to the server and obtain sensitive information.

Pivotal Spring Framework could allow a remote attacker to traverse directories on the system, caused by improper validation of user request. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to configure Spring MVC to serve static resources.

Pivotal Spring Framework could allow a remote authenticated attacker to gain elevated privileges on the system, caused by improper input validation. By sending a specially-crafted request, an attacker could exploit this vulnerability to gain elevated privileges.

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.