WatchGuard Dimension Web UI Authentication Brute-Force Due to Missing Rate Limiting

Summary #

WatchGuard Dimension's web login endpoint does not enforce effective rate-limiting or account lockout by default allowing a remote attacker to perform automated password guessing against user accounts. If the account lockout setting is enabled, brute-force attempts are blocked after a defined number of failed attempts, but this setting is not enabled by default.

Impact: A remote unauthenticated attacker can conduct automated brute-force or credential-stuffing attacks against Dimension user accounts, including administrative or operator accounts, potentially leading to full account takeover and compromise of the Dimension server, its logs, and other integrated security tooling.