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      <title>Express应⽤预处理特性绕过服务端校验实现XSS</title>
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      <pubDate>Tue, 03 Mar 2026 20:25:51 +0000</pubDate><author>p0l1st@venomsec.org (p0l1st)</author>
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      <category domain="https://blog.p0l1st.top/categories/web%E5%AE%89%E5%85%A8/">Web安全</category>
      <description>&lt;h1 class=&#34;heading-element&#34; id=&#34;前言&#34;&gt;&lt;span&gt;前言&lt;/span&gt;&#xA;  &lt;a href=&#34;#%e5%89%8d%e8%a8%80&#34; class=&#34;heading-mark&#34;&gt;&#xA;    &lt;svg class=&#34;octicon octicon-link&#34; viewBox=&#34;0 0 16 16&#34; version=&#34;1.1&#34; width=&#34;16&#34; height=&#34;16&#34; aria-hidden=&#34;true&#34;&gt;&lt;path d=&#34;m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z&#34;&gt;&lt;/path&gt;&lt;/svg&gt;&#xA;  &lt;/a&gt;&#xA;&lt;/h1&gt;&lt;p&gt;之前&lt;a href=&#34;https://x.com/AmirMSafari/status/2020569860472750512&#34; target=&#34;_blank&#34; rel=&#34;external nofollow noopener noreferrer&#34;&gt;推特&lt;/a&gt;上的一道题，题目环境：https://pwnbox.xyz/&lt;/p&gt;</description>
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