Auth0 WordPress Plugin has Insufficient Entropy in Cookie Encryption

### Impact In applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies. ### Am I Affected? Consumers are affected if their application meets the following preconditions: - It is using the Auth0 WordPress Plugin, versions between 5.0.0-BETA0 and 5.5.0 - Auth0 WordPress plugin using the Auth0-PHP SDK versions between 8.0.0 to 8.18.0. ### Resolution Upgrade Auth0/wordpress to version 5.6.0 or greater.