Characters allowed before event in attribute name using setAttribute

This vector shows which characters are allowed before an event name when using setAttribute.

Created by: hackvertor

Created on: Wednesday, August 21, 2024 at 11:46:45 AM

Updated on: Monday, September 2, 2024 at 4:58:09 PM

Vector type: JS

Template used:

let img = document.createElement('img');
img.src = 'data:';
img.setAttribute('$[chr]onerror','log($[i])')
document.body.append(img);

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Sample payloads

let img = document.createElement('img');
img.src = 'data:';
img.setAttribute('\onerror','alert(92)')
document.body.append(img);

Chrome 127.0.0.0 desktop macOS 10.15.7

Found 1 result

Show differences only?

Dec	Hex	Chr
92	5c	\

Firefox 129.0 desktop macOS 10.15

Found 1 result

Show differences only?

Dec	Hex	Chr
92	5c	\

Safari 18.0 desktop macOS 10.15.7

Found 1 result

Show differences only?

Dec	Hex	Chr
92	5c	\