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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/9stb36m6ele?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/fwfijxzc7z?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/gy6o5nwgwdt?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/jhgd9rk7p7?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/7sjwg2aubjc?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/fxffcu5z5wq?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/zgvhe0bn7er?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/2uwz5krx3vk?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/41ldt5smk4p?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/vb4ebaop9dq?59);';
document.head.appendChild(style);