好的，我现在需要帮用户总结一篇文章的内容，控制在100字以内。首先，我得仔细阅读用户提供的文章内容，抓住主要信息。 文章讲述的是Mahmoud在Shopify的漏洞赏金活动中发现了一个Handlebars模板注入漏洞的故事。他最初是在测试Return Magic应用的邮件功能时，通过输入{{this}}发现了异常反应，进而展开了深入研究。这个过程涉及到了国际旅行和深夜的 hacking 会话，最终在3万英尺的高空取得了突破。 接下来，我需要将这些关键点浓缩到100字以内。要确保涵盖主要人物、事件、发现的过程以及结果。同时，语言要简洁明了，避免复杂的结构。 可能会这样组织：Mahmoud在Shopify活动中发现Return Magic应用的模板注入漏洞。他通过测试邮件功能中的{{this}}触发了JavaScript评估，并最终在高空中成功利用漏洞。整个过程充满了侦探式的调查和国际合作。 最后，检查一下字数是否符合要求，并确保没有使用“文章内容总结”之类的开头语。直接描述即可。 </think> Mahmoud发现Shopify Return Magic应用存在Handlebars模板注入漏洞，在测试邮件功能时触发JavaScript评估，并最终成功利用该漏洞。 2025-10-30 08:57:12 Author: infosecwriteups.com(查看原文) 阅读量:8 收藏
While studying advanced template injection techniques, I came across one of the most fascinating bug bounty stories I’ve ever encountered. Researcher Mahmoud’s journey to discover a Handlebars template injection vulnerability in Shopify’s Return Magic app reads like a digital detective novel, complete with international travel, late-night hacking sessions, and a breakthrough at 30,000 feet.
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The Setup: An Innocent-Looking Email Feature
The story begins at Shopify’s H1–514 bug bounty event in 2018. Mahmoud was testing the Return Magic app, which included an email workflow feature that allowed shop owners to customize return notification emails using template variables like {{order.number}} and {{email}}.
The Initial Clue:
When Mahmoud entered {{this}} in an email template and received [object Object] in the test email, his curiosity was piqued. This simple response indicated that user input was being evaluated in a JavaScript context on the server side.
The False Start: Wrong Engine, Right Instinct
Mahmoud initially thought the app was using Mustache.js, a “logic-less” template engine that shouldn’t…
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