---
id: 5015
title: "Solution for “A Weird XSS Case”"
source_domain: yeswehack.com
source_url: "https://www.yeswehack.com/community/solution-for-a-weird-xss-case"
published_at: "2019-04-01T13:47:00Z"
tags: ["ctf", "web-security", "xss", "bsides", "javascript", "writeup"]
phying_url: "https://phying.com/item/5015"
lang: en
---

# Solution for “A Weird XSS Case”

## Summary

Full solution to the 'A Weird XSS Case' challenge from BSidesDublin 2019, which stumped live attendees: three late solvers trace the promise-based flow and filter bypasses used to fire an alert.

## Intelligence Metadata

- **Sources:** yeswehack.com
- **Published:** 2019-04-01T13:47:00Z
- **Original:** https://www.yeswehack.com/community/solution-for-a-weird-xss-case
- **Phying News:** https://phying.com/item/5015