h1-ctf: [h1-2006 CTF] Multiple vulnerabilities leading to account takeover and two-factor authentication bypass allows to send pending bounty payments

Hi, First things first, the flag of the CTF challenge. F863095 Write-Up I've published my write-up at https://kapytein.nl/texts/2020-06-10-h1-2006-ctf-writeup-2cf34abd3ed/, in order to avoid a lengthy report 😅. TL;DR 1 2FA bypass as we control both values on the comparison. 2 SSRF to...

X (Formerly Twitter): XSS via Direct Message deeplinks

Description: By using a specially crafted payload as the value of the text parameter in a Direct Message deeplink, a malicious user can inject arbitrary HTML tags and possibly run arbitrary JavaScript code on the "twitter.com" origin. Steps To Reproduce: 1. Create a Direct Message deeplink by...