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Characters that close an @x prefix before @import

Checks which characters can be inserted into CSS style declarations before a @x prefix.

Shazzer Master

Created byhackvertor

Created Aug 6, 2026

Updated Sep 5, 2026

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CategoryCSS Parsing

VisibilityPublic

TypeJS

CharsetUTF-8

Template used:

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint($[i])+'@import url(https://fuzz.shazzer.co.uk/$[rand]?$[i]);';
document.head.appendChild(style);

Sample payloads

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/am3keieo9a8?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/lxbucr7qos?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/15210zxwyrzj?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/yzhbpbh1va?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/xrf9f4nx47m?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/yxl6u9zgs3s?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/udhk5n5dcu?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/e91z7e85m0g?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/yim0eztkfko?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/938xwsvw6zf?59);';
document.head.appendChild(style);