=== VULNERABLE (v1.0.1) Response Headers ===
HTTP/1.1 200 OK
Content-Type: text/html
Cache-Control: max-age=2592000, public
X-Content-Type-Options: nosniff
X-XSS-Protection: 0
X-Frame-Options: DENY

[VULNERABLE] Content-Type: text/html - browser renders HTML inline
[VULNERABLE] No Content-Security-Policy - JavaScript executes freely
[VULNERABLE] No Content-Disposition: attachment - file rendered inline, not downloaded

=== FIXED (v1.0.2) Response Headers ===
HTTP/1.1 200 OK
Content-Type: text/plain;charset=utf-8
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
Cache-Control: max-age=86400, must-revalidate, public
Content-Security-Policy: default-src 'none'; base-uri 'none'; form-action 'none'; frame-ancestors 'none'; sandbox
X-XSS-Protection: 0

[FIXED] Content-Type: text/plain;charset=utf-8 - browser displays as plain text, no HTML rendering
[FIXED] Content-Security-Policy: strict CSP prevents all script execution, network requests, framing
[FIXED] Even if content type were overridden, CSP sandbox blocks JavaScript execution