A deserialization flaw was discovered in the jackson-databind that could allow an unauthenticated user to perform code execution by sending the maliciously crafted input to the readValue method of the ObjectMapper. This issue extends the previous flaws CVE-2017-7525 and CVE-2017-17485 by blacklisting more classes that could be used maliciously.

A vulnerability which allows for a potential privilege escalation was found in the Hibernate Validator. If a security manager is present and HV itself is allowed to access private members reflectively as per the SM's configuration, that'll allow calling code without that permission to get hold of private state. The attack vector is to declare a constraint on a private member using XML, validate an invalid instance of that type and access the private member value via ConstraintViolation#getInvalidValue().