CVE-2009-4142

This exploit demonstrates a cross-site scripting (XSS) vulnerability in PHP versions prior to 5.2.12 due to improper sanitization of user-supplied input when using the Shift_JIS charset. The PoC shows how an attacker can inject malicious JavaScript into a web page via crafted GET parameters.

This exploit demonstrates a cross-site scripting (XSS) vulnerability in PHP versions prior to 5.2.12 due to improper sanitization of user-supplied input with malformed UTF-8, Shift_JIS, and EUC-JP sequences. The PoC shows how `htmlspecialchars` fails to properly escape these sequences, allowing arbitrary script execution in a user's browser context.