Introduction:
Hi, I’m AIwolfie, a passionate bug bounty hunter with a knack for uncovering hidden vulnerabilities. I enjoy diving deep into websites, spotting security flaws, and helping make the internet safer. Recently, I identified a Cross-Site Scripting (XSS) vulnerability on a news website. Here’s the story of how I found it, tested it further, and helped the team patch it — all while having some fun along the way.
Step 1: The Discovery
While testing the search functionality of the website, I injected this payload:
<image src=1 href=1 onerror="javascript:alert(1)"></image>When I submitted the payload, the browser executed it, confirming the vulnerability. It displayed a popup alert, proving the website was vulnerable to XSS.
Me at that time: “Abe ye toh chal gaya!”
Step 2: Testing Further
To assess the full extent of the vulnerability, I crafted an additional payload to demonstrate redirection:
<image src=1 href=1 onerror="javascript:window.location='https://example.com'"></image>When I tested this, the page redirected to https://example.com, showing that attackers could exploit this to redirect users to phishing pages or other malicious sites.
“Logon ke account ka toh band baj jayega!”
Step 3: The Report
I documented the findings in a report, which included:
- The initial payload used for the popup alert.
- The redirect payload, showcasing its potential for phishing attacks.
- Steps to reproduce the vulnerability.
- The security risks posed by the issue.
- Recommended fixes, including:
- Input validation.
- Output encoding.
- Implementing a Content Security Policy (CSP).
The website administrators responded promptly, thanking me and confirming that the issue had been fixed.
Step 4: Lessons Learned
- Input validation is critical: All inputs, especially those originating from users, must be sanitized and validated.
- Secure your outputs: Any user-supplied content should be properly encoded before rendering on a webpage.
- Enable CSP: A well-configured Content Security Policy can significantly reduce the risk of XSS attacks.
Final Thoughts
This experience reminded me why I love being a part of the bug bounty community. It’s not just about finding vulnerabilities but about contributing to a safer digital world.
What do you think of this story? Let’s connect and share our bug-hunting adventures!