pentester.land· Dec 20, 2021· by Wladimir Palant (@WPalant)

Yes, fun browser extensions can have vulnerabilities too!

Target Program: Meow

🎯 Vulnerability: Cross-Site Scripting (XSS)

💡 Defense Fix: Enforce Context-Aware Output Encoding, strict Content-Security-Policy (CSP), and HttpOnly cookie flags.

#XSS#Browser extension hacking#postMessage