XXE issue in Airsonic before 10.1.2 during parse.

Airsonic 10.2.1 uses Spring's default remember-me mechanism based on MD5, with a fixed key of airsonic in GlobalSecurityConfig.java. An attacker able to capture cookies might be able to trivially bruteforce offline the passwords of associated users.

In Airsonic 10.2.1, RecoverController.java generates passwords via org.apache.commons.lang.RandomStringUtils, which uses java.util.Random internally. This PRNG has a 48-bit seed that can easily be bruteforced, leading to trivial privilege escalation attacks.