CVE-2026-66824— Stored Cross-Site Scripting via Unsafe Capture Tree JSON Embedding

Stored Cross-Site Scripting via Unsafe Capture Tree JSON Embedding

A stored cross-site scripting vulnerability existed in the capture tree visualization page. The application embedded the serialized capture tree directly into an inline JavaScript block using the Jinja safe filter. Because the tree data can contain values derived from captured and potentially attacker-controlled web content, a specially crafted value could prematurely terminate the surrounding <script> element and inject arbitrary HTML or JavaScript. The malicious code would execute in the browser of a user viewing the affected capture tree. Successful exploitation could allow an attacker to perform actions using the victim’s authenticated session, access information available to the victim, or modify application data within the permissions of the affected user. The patch removes the JSON data from the HTML document and retrieves it through a dedicated API endpoint. The client then processes the response using response.json(), preventing capture data from being interpreted as executable content within the original page’s HTML or JavaScript context.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:N/SA:N

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

lookyloo 跨站脚本漏洞

Lookyloo是Lookyloo组织开源的一个网站捕获工具。 lookyloo 1.40.0及之前版本存在跨站脚本漏洞，该漏洞源于使用Jinja safe filter将序列化的捕获树直接嵌入内联JavaScript块，特制值可能提前终止<script>元素并注入任意HTML或JavaScript，导致存储型跨站脚本攻击。

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