0_medium_vuln_en.md Disclosure of a vulnerability that allows the theft of visitors' email addresses using Medium's custom domain feature Author: mala Introduction This article describes a vulnerability in a web service called Medium that allows you to steal visitors' e-mail addresses by using custom domain plan of Medium. This is done as my personal activity and is not related to my organization.
![Disclosure of a vulnerability that allows the theft of visitors' email addresses using Medium's custom domain feature / Mediumの独自ドメインプランを使って訪問者のメールアドレスが窃取できる脆弱性の開示](https://cdn-ak-scissors.b.st-hatena.com/image/square/1ef26f6cb4349557952890dbe3e567f7f98dc151/height=288;version=1;width=512/https%3A%2F%2Fgithub.githubassets.com%2Fassets%2Fgist-og-image-54fd7dc0713e.png)