---
title: "Discussion on \"My ESP32 sent <script>alert(1)</script> to my dashboard. Not from a web request. From a temperature sensor. I didn't write that code.\" | Hashnode"
description: "Discussion on \"My ESP32 sent <script>alert(1)</script> to my dashboard. Not from a web request. From a temperature sensor. I didn't write that code.\". The origin and development of Jevil_tester, a testing system for IoT apps"
url: "https://hashnode.com/posts/jevil-tester/69fad0a1a386d7f121133a55"
---

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# [My ESP32 sent <script>alert(1)</script> to my dashboard. Not from a web request. From a temperature sensor. I didn't write that code.](https://osorio.hashnode.dev/jevil-tester?utm_source=hashnode&utm_medium=feed)

The origin and development of Jevil\_tester, a testing system for IoT apps

May 6 · 20 min read · osorio.hashnode.dev  
Updated May 11  
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-   [#breakingappshackathon](https://hashnode.com/tag/breakingappshackathon)
-   [#breaking-apps-hackathon](https://hashnode.com/tag/breaking-apps-hackathon)
-   [#iot](https://hashnode.com/tag/iot)
-   [#iot-security](https://hashnode.com/tag/iot-security)
-   [#iot-project](https://hashnode.com/tag/iot-project)
-   [#playwright](https://hashnode.com/tag/playwright)
-   [#passmark](https://hashnode.com/tag/passmark)
-   [#hashnode](https://hashnode.com/tag/hashnode)
-   [#bugs-and-errors](https://hashnode.com/tag/bugs-and-errors)

## Written by

[Carlos Osorio](https://hashnode.com/@xlceor)

@xlceor · Mexico

  
[View profile](https://hashnode.com/@xlceor)

Systems Builder (Software + Embedded + Robotics)

I build systems that connect software with the physical world — turning human intention into real, measurable action. What started as web development evolved into designing full-stack architectures that go beyond screens: systems that sense, decide, and act through hardware, real-time communication, and intelligent control.

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