MatchTheRegex

#regex #cybersecurity #picoctf #beginners

MatchTheRegex

100 points

AUTHOR: SUNDAY JACOB NWANYIM

Description
How about trying to match a regular expression
The website is running here.

Note: This challenge launches an instance on demand.

Looking inside the script tag we can see:

<script>
    function send_request() {
        let val = document.getElementById("name").value;
        // ^p.....F!?
        fetch(`/flag?input=${val}`)
            .then(res => res.text())
            .then(res => {
                const res_json = JSON.parse(res);
                alert(res_json.flag)
                return false;
            })
        return false;
    }

</script>