The htdocs/index.php?mainmenu=home login page in Dolibarr 10.0.6 allows an unlimited rate of failed authentication attempts.
https://tufangungor.github.io/exploit/2020/01/18/dolibarr-10.0.6-brute-force.html
http://packetstormsecurity.com/files/163541/Dolibarr-ERP-CRM-10.0.6-Login-Brute-Forcer.html