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>
The regex is supposed to be ^p.....F!?, literally the first and only guess was picoCTF, when I entered it gave the flag:
picoCTF{your flag}
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