bl-kernel/security.class.php in Bludit 3.9.2 allows attackers to bypass a brute-force protection mechanism by using many different forged X-Forwarded-For or Client-IP HTTP headers.
https://rastating.github.io/bludit-brute-force-mitigation-bypass/
https://github.com/bludit/bludit/pull/1090
http://packetstormsecurity.com/files/159664/Bludit-3.9.2-Bruteforce-Mitigation-Bypass.html