The Google Authenticator login (ga_login) module 7.x before 7.x-1.3 for Drupal, when multi-factor authentication is enabled, allows remote attackers to bypass authentication for accounts without an associated Google Authenticator token by logging in with the username.

The Google Authenticator login module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.4 for Drupal does not properly identify user account names, which might allow remote attackers to bypass the two-factor authentication requirement via unspecified vectors.

The Google Authenticator login module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.4 for Drupal allows remote attackers to obtain access by replaying the username, password, and one-time password (OTP).