Bug Bounty ShortsHow a Routine Security Review Turned Into a Full Supply Chain Risk Discovery
This article discusses an XSS (Cross-Site Scripting) vulnerability within an enterprise application, which led to the exposure of its entire supply chain. The root cause was insufficient input sanitization in URL parameters, enabling malicious scripts to be injected through a seemingly innocuous 'Enable JavaScript and cookies' prompt. By crafting payloads that stole session cookies and executed arbitrary client-side code within the context of the vulnerable website, an attacker could impersonate users and potentially gain access to sensitive data. The researcher discovered the flaw during a routine security review and received a reward of $20,000 for reporting it. To remediate, validate and sanitize all user inputs to prevent XSS attacks, ensuring they only contain safe characters. Key lesson: Never trust user-provided input blindly; always validate and sanitize it before rendering on the client side. #BugBounty #Cybersecurity #XSS #InputSanitization #SupplyChainRisk
