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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/myg6e27k8?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/ffol7mouxca?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/a8ul1uv2mhq?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/3wce7x62at?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/vq9l0tbgpaf?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/si3kpsnxzsl?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/dng8tqp8ag9?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/j94ulolkfi?59);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x'+String.fromCodePoint(59)+'@import url(https://fuzz.shazzer.co.uk/6ibvvsfkuvu?59);';
document.head.appendChild(style);

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