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Valid characters before domain 1

⚠ Browser differences
Chrome logo 48
Firefox logo 48
Edge logo 48
Safari logo 32

Import from old 1

avlidienbrunn
Created byavlidienbrunn
Created Apr 10, 2024
Updated May 23, 2025

Tweet
Detecting browser...
CategoryURL Handling
VisibilityPublic
TypeXSS
CharsetUTF-8
Template used:
<a href="https://$[chr]example.com/" id="test$[i]"></a>
Code used after fuzz:
if(document.getElementById("test$[i]").host=="example.com"){log($[i])}

Sample payloads

<a href="https://0x09example.com/" id="test9"></a>
<a href="https://
example.com/" id="test10"></a>
<a href="https://0x0Dexample.com/" id="test13"></a>
<a href="https:///example.com/" id="test47"></a>
<a href="https://@example.com/" id="test64"></a>
<a href="https://\example.com/" id="test92"></a>
<a href="https://­example.com/" id="test173"></a>
<a href="https://͏example.com/" id="test847"></a>
<a href="https://ᅟexample.com/" id="test4447"></a>
<a href="https://ᅠexample.com/" id="test4448"></a>
<a href="https://឴example.com/" id="test6068"></a>
<a href="https://឵example.com/" id="test6069"></a>
<a href="https://᠋example.com/" id="test6155"></a>
<a href="https://᠌example.com/" id="test6156"></a>
<a href="https://᠍example.com/" id="test6157"></a>
<a href="https://᠎example.com/" id="test6158"></a>
<a href="https://᠏example.com/" id="test6159"></a>
<a href="https://​example.com/" id="test8203"></a>
<a href="https://⁠example.com/" id="test8288"></a>
<a href="https://⁡example.com/" id="test8289"></a>

Fuzz results

Chrome logo
Chrome 145.0.0.0 desktop Windows NT 10.0
Updated17 Feb 2026
Found 48 results
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Chrome logo
Chrome 144.0.0.0 desktop macOS 10.15.7older version
Updated17 Feb 2026
Found 48 results
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Chrome logo
Chrome 123.0.6312.52 Unknown Unknownolder version
Updated14 Apr 2024
Found 32 results
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Firefox logo
Firefox 148.0 desktop Windows NT 10.0
Updated23 Feb 2026
Found 48 results
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Firefox logo
Firefox 147.0 desktop Linuxolder version
Updated1 Feb 2026
Found 48 results
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Firefox logo
Firefox 124.0 Unknown Unknownolder version
Updated14 Apr 2024
Found 32 results
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Edge logo
Microsoft Edge 145.0.0.0 desktop Windows NT 10.0
Updated18 Feb 2026
Found 48 results
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Safari logo
Safari 17.4 Unknown Unknown
Updated14 Apr 2024
Found 32 results
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