GHSA-3ggv-qwcp-j6xg

Mautic Vulnerable to User Enumeration via Response Timing

### Impact The attacker can validate if a user exists by checking the time login returns. This timing difference can be used to enumerate valid usernames, after which an attacker could attempt brute force attacks. ### Patches This vulnerability has been patched, implementing a timing-safe form login authenticator that ensures consistent response times regardless of whether a user exists or not. ### Technical Details The vulnerability was caused by different response times when: - A valid username was provided (password hashing occurred) - An invalid username was provided (no password hashing occurred) The fix introduces a `TimingSafeFormLoginAuthenticator` that performs a dummy password hash verification even for non-existent users, ensuring consistent timing. ### Workarounds No workarounds are available. Users should upgrade to the patched version. ### References - https://owasp.org/www-project-web-security-testing-guide/latest/4-Web_Application_Security_Testing/03-Identity_Management_Testing/04-Testing_for_Account_Enumeration_and_Guessable_User_Account - https://github.com/mautic/mautic-security/pull/146