��件：</span></p><p><div class="card col-lg-11 col-xl-11"><img src="assist/l1-1.png" referrerpolicy="no-referrer" alt="l1-1"></div></p></li><li><p><span>发现参数</span><code>file</code><span>传入了文件名，尝试穿越目录下载任意文件：</span></p><p><div class="card col-lg-11 col-xl-11"><img src="assist/l1-2.png" referrerpolicy="no-referrer" alt="l1-2"></div></p></li></ol>
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