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Characters transformed when using lowercase

This vector demonstrates which codePoints transform to ascii characters when using toLowerCase() Related vector: shazzer.co.uk/vectors/661713f26438aee019a61a71

Shazzer Master

Created Nov 18, 2024

Updated May 27, 2025

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CategoryXSS Execution

VisibilityPublic

TypeJS

CharsetUTF-8

Template used:

let transformedChr = String.fromCodePoint($[i]).toLowerCase();
$[i] > 0x7f &&
/^\w+$/.test(transformedChr) &&
log($[i] + '=>' + transformedChr)

Sample payloads

let transformedChr = String.fromCodePoint(0).toLowerCase();
0 > 0x7f &&
/^\w+$/.test(transformedChr) &&
alert(0 + '=>' + transformedChr)