login captcha issue

[vahid ghasemi]

Hello
I have a login form with a captcha.
I tested my form with Burp suite (penetration test tool).
in Burp I can send header requests a lot of time for brood force(just
change password).
this problem is because of the number at end of my
URL(localhost:8080/login?1).
so with this way attackers can bypass captcha.
how can i fix this problem.