{"id":41,"date":"2026-03-14T22:30:57","date_gmt":"2026-03-14T14:30:57","guid":{"rendered":"http:\/\/47.118.30.30\/?p=41"},"modified":"2026-03-15T11:40:26","modified_gmt":"2026-03-15T03:40:26","slug":"dom-clobbering","status":"publish","type":"post","link":"https:\/\/arknight.wiki\/index.php\/2026\/03\/14\/dom-clobbering\/","title":{"rendered":"Dom Clobbering"},"content":{"rendered":"<h1>Dom Clobbering<\/h1>\n<p>\u4e00\u4e9b\u9884\u5907\u7684\u77e5\u8bc6\uff1a<\/p>\n<pre><code>window\uff1a\n\u662f\u6d4f\u89c8\u5668\u4e2d\u5168\u5c40\u5bf9\u8c61\uff08Global Object\uff09\u3002\n\u6240\u6709\u5168\u5c40\u53d8\u91cf\u3001\u51fd\u6570\u3001\u5185\u7f6e\u5bf9\u8c61\uff08\u5982 alert, setTimeout, console\uff09\u90fd\u6302\u5728 window \u4e0a\u3002\n\u4f60\u53ef\u4ee5\u5199 window.alert(\"Hello\") \u6216\u76f4\u63a5\u5199 alert(\"Hello\") \u2014\u2014 \u6548\u679c\u4e00\u6837\u3002\n\u5728\u6d4f\u89c8\u5668\u73af\u5883\u4e2d\uff0cthis \u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e0b\u4e5f\u6307\u5411 window\u3002 \n\ndocument\uff1a\n\u662f window \u5bf9\u8c61\u7684\u4e00\u4e2a\u5c5e\u6027\uff1awindow.document\u3002\n\u4ee3\u8868\u5f53\u524d\u7f51\u9875\u7684 HTML \u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff08Document Object Model\uff09\u3002\n\u901a\u8fc7\u5b83\uff0cJavaScript \u53ef\u4ee5\u8bbf\u95ee\u3001\u4fee\u6539\u9875\u9762\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff08\u6bd4\u5982 document.getElementById(), document.querySelector()\uff09\u3002\n\u5b83\u4e5f\u662f DOM \u64cd\u4f5c\u7684\u6838\u5fc3\u5165\u53e3\u3002 <\/code><\/pre>\n<h2>\u539f\u7406\uff1a<\/h2>\n<p>\u6d4f\u89c8\u5668\u4e3a\u4e86\u517c\u5bb9\u65e7\u5f0f Web \u8868\u5355\u884c\u4e3a\uff0c\u4f1a\u81ea\u52a8\u5c06\u5e26\u6709 <code>id<\/code> \u6216 <code>name<\/code> \u5c5e\u6027\u7684 HTML \u5143\u7d20\u6302\u8f7d\u5230 <code>window<\/code> \u6216 <code>document<\/code> \u5bf9\u8c61\u4e0a\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u505a\u5230\u6c61\u67d3htmlDOM\u7684\u4e00\u4e9b\u5bf9\u8c61\uff0c\u4e0d\u8fc7\u5c40\u9650\u662f\u65e0\u6cd5\u6c61\u67d3\u4e00\u4e9b\u660e\u6587\u8d4b\u503c\u7684\u5bf9\u8c61<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre><code>&lt;img id=x&gt;\n&lt;img name=y&gt;\n&lt;script&gt;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(x);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/&lt;img id=x&gt;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(y);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/&lt;img id=y&gt;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(document.x);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/&lt;img id=x&gt;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(document.y);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/undefined\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(window.x);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/&lt;img id=x&gt;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(window.y);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/&lt;img id=y&gt;\n&lt;\/script&gt;<\/code><\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cid\u90fd\u4f1a\u7ed1\u5b9a\u5230<code>window<\/code> \u548c <code>document<\/code> \u5bf9\u8c61\uff0c\u800cname\u4ec5\u90e8\u5206\uff08<a>\uff0c<applet>\uff0c<\/p>\n<area>\uff0c<embed>\uff0c<\/p>\n<form>,<formset>,<\/img>,<input>,<object>,<select>,<textarea>\uff09\u7ed1\u5b9a\u5230<code>window<\/code>\u4e0a<\/p>\n<p>\u4e00\u4e2a\u6c61\u67d3\u7684\u4f8b\u5b50\uff1a<\/p>\n<pre><code>\/\/ 1. \u521d\u59cb\u72b6\u6001\uff1adocument.cookie\ndocument.cookie\n\n\/\/ 2. \u521b\u5efa\u4e00\u4e2a &lt;div&gt; \u5143\u7d20\nvar div = document.createElement('div')\n\n\/\/ 3. \u8bbe\u7f6e div \u7684 innerHTML \u4e3a &lt;img name=cookie&gt;\ndiv.innerHTML = '&lt;img name = cookie&gt;'\n\n\/\/ 4. \u5c06 div \u6dfb\u52a0\u5230\u9875\u9762 body \u4e2d\ndocument.body.appendChild(div)\n\n\/\/ 5. \u518d\u6b21\u8bbf\u95ee document.cookie \u2014\u2014 \u5df2\u88ab\u8986\u76d6\uff01\uff0c\u662f&lt;img name = cookie&gt;\ndocument.cookie<\/code><\/pre>\n<p>\u5229\u7528\u8fd9\u4e2a\u4f60\u751a\u81f3\u53ef\u4ee5\u6c61\u67d3\u4e00\u4e9b\u5185\u7f6e\u51fd\u6570<\/p>\n<pre><code>&lt;form name=\"body\"&gt;\n  &lt;img id=\"appendChild\"&gt;\n&lt;\/form&gt;\n&lt;script&gt;\n  var div = document.createElement('div');\n  document.body.appendChild(div);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u8fd9\u4e00\u6b65\u4f1a\u62a5\u9519\uff0c\u56e0\u4e3aappendChild\u5df2\u7ecf\u4e0d\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u5df2\u88ab\u6c61\u67d3\n&lt;\/script&gt; <\/code><\/pre>\n<p>\u5bf9\u4e8e\u2f24\u591a\u6570\u60c5\u51b5\u6765\u8bf4\uff0c\u6211\u4eec\u53ef\u80fd\u66f4\u9700\u8981\u5c06\u5176\u8f6c\u6362\u4e3a\u2f00\u4e2a\u53ef\u63a7\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u4ee5\u4fbf\u6211\u4eec\u8fdb\u2f8f\u64cd\u4f5c\u3002\u8fd9\u65f6\u53ef\u7528\u7684\u6807\u7b7e\u5c31\u53ea\u6709<a>,\u5b83\u81ea\u5e26tostring\uff08\uff09\u65b9\u6cd5\uff0c\u53ef\u6253\u5370\u51fahref\u7684\u503c\u3002<\/p>\n<h2>\u591a\u5c42\u7ea7\u6784\u9020\uff1a<\/h2>\n<p>\u6709\u65f6\u6211\u4eec\u9700\u8981\u591f\u9020\u80fd\u7528x.y.z\u8fd9\u6837\u7684\u5f62\u5f0f\u8bbf\u95ee\u7684\u5bf9\u8c61\uff0c\u6b64\u65f6\u4fbf\u9700\u8981\u7528\u5230\u591a\u5c42\u7ea7\u6784\u9020<\/p>\n<h4>\u4f7f\u7528HTMLCollection\uff1a<\/h4>\n<p>HTMLCollection\u662f\u4ec0\u4e48\uff1aelement\u00a0\u7684\u00a0\u201c\u00a0\u96c6\u5408\u00a0\u201d\u7c7b\uff0c\u4e5f\u5c31\u662f\u5c06\u540cid\u5143\u7d20\uff08\u81f3\u5c11\u4e24\u4e2a\uff09\u6536\u96c6\u4e3a\u4e00\u4e2a\u4ee5\u8fd9\u4e2aid\u547d\u540d\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u901a\u8fc7collection[name]\u00a0\u7684\u5f62\u5f0f\u6765\u8c03\u2f64\u5176\u4e2d\u7684\u5143\u7d20<\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre><code>&lt;div id = \"x\" &gt;\n        &lt;a id = \"x\" name = y href = \"aaaaaa\" &gt;&lt;\/a&gt;\n&lt;\/div&gt;\n&lt;script&gt; \n        alert(x.y);\n&lt;\/script&gt;\n\/\/\u6253\u5370\u51fa&lt;a id = \"x\" name = y href = \"aaaaaa\" &gt;&lt;\/a&gt;<\/code><\/pre>\n<p>\u8fd9\u91ccdiv\u548ca\u540cid\uff0c\u751f\u6210\u4e00\u4e2ax\u6570\u7ec4\uff0c\u5176\u4e2d\u7b2c\u4e00\uff0c\u4e8c\u4e2a\u5143\u7d20\u662fdiv\uff0ca\uff0cx.y\u8bbf\u95ee\u5230a\uff0c\u518d\u5c06\u5b83\u6253\u5370<\/p>\n<h4>\u4f7f\u7528HTML Relationships\uff1a<\/h4>\n<p>\u53ef\u4ee5\u901a\u8fc7\u5229\u2f64HTML\u6807\u7b7e\u4e4b\u95f4\u672c\u8eab\u5b58\u5728\u7684\u5c42\u7ea7\u5173\u7cfb\u6765\u6784\u5efa\u5c42\u7ea7\u5173\u7cfb<\/p>\n<p>\u4e00\u4e2a\u5bfb\u627e\u53ef\u5229\u7528\u6807\u7b7e\u7684\u811a\u672c\uff1a<\/p>\n<pre><code>&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n&lt;head&gt;&lt;title&gt;Test Props&lt;\/title&gt;&lt;\/head&gt;\n&lt;body&gt;\n&lt;script&gt; \n        var log=[];\nvar html = \n[\"a\",\"abbr\",\"acronym\",\"address\",\"applet\",\"area\",\"article\",\"aside\",\"audio\",\"b\",\"base\",\"basefont\",\"bdi\",\"bdo\",\"bgsound\",\"big\",\"blink\",\"blockquote\",\"body\",\"br\"\n,\"button\",\"canvas\",\"caption\",\"center\",\"cite\",\"code\",\"col\",\"colgroup\",\"command\",\"content\",\"data\",\"datalist\",\"dd\",\"del\",\"details\",\"dfn\",\"dialog\",\"dir\",\"div\"\n,\"dl\",\"dt\",\"element\",\"em\",\"embed\",\"fieldset\",\"figcaption\",\"figure\",\"font\",\"footer\",\"form\",\"frame\",\"frameset\",\"h1\",\"head\",\"header\",\"hgroup\",\"hr\",\"html\",\"i\"\n,\"iframe\",\"image\",\"img\",\"input\",\"ins\",\"isindex\",\"kbd\",\"keygen\",\"label\",\"legend\",\"li\",\"link\",\"listing\",\"main\",\"map\",\"mark\",\"marquee\",\"menu\",\"menuitem\",\"meta\"\n,\"meter\",\"multicol\",\"nav\",\"nextid\",\"nobr\",\"noembed\",\"noframes\",\"noscript\",\"object\",\"ol\",\"optgroup\",\"option\",\"output\",\"p\",\"param\",\"picture\",\"plaintext\",\"pre\"\n,\"progress\",\"q\",\"rb\",\"rp\",\"rt\",\"rtc\",\"ruby\",\"s\",\"samp\",\"script\",\"section\",\"select\",\"shadow\",\"slot\",\"small\",\"source\",\"spacer\",\"span\",\"strike\",\"strong\",\"style\"\n,\"sub\",\"summary\",\"sup\",\"svg\",\"table\",\"tbody\",\"td\",\"template\",\"textarea\",\"tfoot\",\"th\",\"thead\",\"time\",\"title\",\"tr\",\"track\",\"tt\",\"u\",\"ul\",\"var\",\"video\",\"wbr\",\"xmp \"]\n, logs = [];\ndiv=document.createElement('div')\n; for(var i=0;i&lt;html.length;i++)\n{\nfor(var j=0;j&lt;html.length;j++) {\ndiv.innerHTML='&lt;'+html[i]+' id=element1&gt;'+'&lt;'+html[j]+' id=element2&gt;'; document.body.appendChild(div);\nif(window.element1 &amp;&amp;\nelement1.element2){ \nlog.push(html[i]+','+html[j]);\n}\ndocument.body.removeChild(div);\n}\n}\nconsole.log(log.join('n'));\n&lt;\/script&gt;   \n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre>\n<p>\u7ec4\u540e\u53ef\u7528\u53d1\u73b0\uff0c\u53ef\u5229\u7528\u7684\u6709\uff1a<\/p>\n<pre><code>form-&gt;button\nform-&gt;fieldset\nform-&gt;image\nform-&gt;img\nform-&gt;input\nform-&gt;object\nform-&gt;output\nform-&gt;select\nform-&gt;textarea<\/code><\/pre>\n<p>\u4f8b\uff1a<\/p>\n<pre><code>&lt;form id=x&gt;&lt;output id=y&gt;114514&lt;\/output&gt;&lt;\/form&gt;\n&lt;script&gt;\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(x.y.value);\n&lt;\/script&gt;\n\/\/\u8f93\u51fa\uff1a114514<\/code><\/pre>\n<h4>\u4f7f\u7528\u6807\u7b7e\u4e0e\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u5c5e\u6027\uff1a<\/h4>\n<p>\u90e8\u5206\u6807\u7b7e\u7684\u90e8\u5206\u5c5e\u6027\uff08DOM \u5143\u7d20\u5bf9\u8c61\u4e0a\u6709\u540c\u540d\u7684 JavaScript \u5c5e\u6027\uff09\u53ef\u4ee5\u901a\u8fc7x.y\u7684\u5f62\u5f0f\u8bbf\u95ee<\/p>\n<p>\u4e00\u4e2a\u5bfb\u627e\u53ef\u5229\u7528\u6807\u7b7e\u5c5e\u6027\u7684\u811a\u672c\uff1a<\/p>\n<pre><code>&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n&lt;head&gt;&lt;title&gt;Test Props&lt;\/title&gt;&lt;\/head&gt;\n&lt;body&gt;\n&lt;script&gt;\n\/\/ \u5b9a\u4e49\u8981\u6d4b\u8bd5\u7684 HTML \u6807\u7b7e\nvar html = ['div', 'input', 'img', 'a', 'span', 'button'];\nvar props = [];\n\nfor (let i = 0; i &lt; html.length; i++) {\n    const tagName = html[i];\n    const obj = document.createElement(tagName);\n\n    \/\/ \u904d\u5386\u5143\u7d20\u7684\u6240\u6709\u5c5e\u6027\n    for (let prop in obj) {\n        if (typeof obj[prop] === 'string') {\n            try {\n                \/\/ \u521b\u5efa\u4e00\u4e2a\u4e34\u65f6\u5bb9\u5668\n                const tempDiv = document.createElement('div');\n                \/\/ \u6784\u9020\u5e26\u5c5e\u6027\u7684 HTML\uff08\u6ce8\u610f\u5c5e\u6027\u503c\u8981\u52a0\u5f15\u53f7\uff09\n                tempDiv.innerHTML = `&lt;${tagName} id=\"x\" ${prop}=\"1\"&gt;`;\n                const testEl = tempDiv.firstElementChild;\n\n                \/\/ \u68c0\u67e5\u8be5\u5c5e\u6027\u662f\u5426\u88ab\u6b63\u786e\u8bbe\u7f6e\u4e3a \"1\"\n                if (testEl &amp;&amp; testEl[prop] === \"1\") {\n                    props.push(tagName + ':' + prop);\n                }\n            } catch (e) {\n                \/\/ \u5ffd\u7565\u9519\u8bef\uff08\u5982\u5c5e\u6027\u540d\u975e\u6cd5\uff09\n            }\n        }\n    }\n}\n\n\/\/ \u53bb\u91cd\u5e76\u8f93\u51fa\nconsole.log([...new Set(props)].join('n'));\n&lt;\/script&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre>\n<p>\u4f8b\uff1a<\/p>\n<pre><code>&lt;a id = x title = 'aaa' &gt;&lt;\/a&gt;\n&lt;script&gt;\nconsole . log ( x . title ); \/\/aaa\n&lt;\/script&gt;<\/code><\/pre>\n<h4>\u4f7f\u7528iframe\uff1a<\/h4>\n<p>\u5f53\u521b\u5efa\u4e86\u4e00\u4e2a<code>iframe<\/code> \u5e76\u7ed9\u5b83\u4e00\u4e2a <code>name<\/code> \u65f6\uff0c\u7528\u8fd9\u4e2a <code>name<\/code> \u5c31\u53ef\u4ee5\u6307\u5230 <code>iframe<\/code> \u91cc\u9762\u7684 <code>window<\/code><\/p>\n<p>\u4f8b\uff1a<\/p>\n<pre><code>&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n&lt;body&gt;\n  &lt;iframe name=\"config\" srcdoc='\n    &lt;a id=\"apiUrl\"&gt;&lt;\/a&gt;\n  '&gt;&lt;\/iframe&gt;\n  &lt;script&gt;\n    setTimeout(() =&gt; {\n      console.log(config.apiUrl) \/\/ &lt;a id=\"apiUrl\"&gt;&lt;\/a&gt;\n    }, 500)\n  &lt;\/script&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre>\n<p>\u8fd9\u91cc\u4e4b\u6240\u4ee5\u4f1a\u9700\u8981 <code>setTimeout<\/code> \u662f\u56e0\u4e3a <code>iframe<\/code> \u5e76\u4e0d\u662f\u540c\u6b65\u8f7d\u5165\u7684\uff0c\u6240\u4ee5\u9700\u8981\u4e00\u4e9b\u65f6\u95f4\u624d\u80fd\u6b63\u786e\u62ff\u5230 <code>iframe<\/code> \u91cc\u7684\u4e1c\u897f\u3002<\/p>\n<p>\u7406\u8bba\u4e0aiframe\u91cc\u9762\u53ef\u4ee5\u7ee7\u7eed\u5957iframe\uff0c\u4f46\u5b9e\u9645\u6700\u591a\u56db\u5c42\uff1a<\/p>\n<pre><code>&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n&lt;body&gt;\n  &lt;iframe name=\"level1\" srcdoc=\"\n    &lt;iframe name=\"level2\" srcdoc=\" \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\"\u4f1a\u89e3\u7801\u4e3a\"\n      &lt;iframe name='level3' srcdoc='\n        &lt;iframe name=level4&gt;&lt;\/iframe&gt;\n      '&gt;&lt;\/iframe&gt;\n    \"&gt;&lt;\/iframe&gt;\n  \"&gt;&lt;\/iframe&gt;\n  &lt;script&gt;\n    setTimeout(() =&gt; {\n      console.log(level1.level2.level3.level4)\n    }, 500)\n  &lt;\/script&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre>\n<h4>\u7efc\u5408\u8fd0\u7528\uff1a<\/h4>\n<pre><code>&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n&lt;body&gt;\n  &lt;iframe name=\"level1\" srcdoc=\"\n    &lt;iframe name=\"level2\" srcdoc=\" \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\n      &lt;iframe name='level3' srcdoc='\n        &lt;form id=\"config\"&gt;&lt;\/form&gt;\n   \u00a0\u00a0\u00a0\u00a0\u00a0&lt;form id=\"config\" name=\"prod\"&gt;\n      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;input name=\"apiUrl\" value=\"123\" \/&gt;\n    \u00a0\u00a0\u00a0\u00a0&lt;\/form&gt;\n      '&gt;&lt;\/iframe&gt;\n    \"&gt;&lt;\/iframe&gt;\n  \"&gt;&lt;\/iframe&gt;\n  &lt;script&gt;\n    setTimeout(() =&gt; {\n      console.log(level1.level2.level3.config.prod.apiUrl.value)\n    }, 500)\n  &lt;\/script&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;\n\/\/\u6253\u5370123<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Dom Clobbering \u4e00\u4e9b\u9884\u5907\u7684\u77e5\u8bc6\uff1a window\uff1a \u662f\u6d4f\u89c8\u5668\u4e2d\u5168\u5c40\u5bf9\u8c61\uff08Global Object [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-41","post","type-post","status-publish","format-standard","hentry","category-3"],"_links":{"self":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/41","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/comments?post=41"}],"version-history":[{"count":1,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/41\/revisions"}],"predecessor-version":[{"id":64,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/41\/revisions\/64"}],"wp:attachment":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/media?parent=41"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/categories?post=41"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/tags?post=41"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}