Sanitize reflected GET parameter to prevent reflected XSS in admin.php #99
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A reflected cross-site scripting (XSS) vulnerability exists in admin.php, allowing attackers to inject malicious scripts into the application's output, which could lead to session hijacking or defacement. Specifically, the application directly echoes unsanitized user-supplied input from the
$_GET['asdf']parameter on lines 16-17. This behavior enables an attacker to craft a malicious URL that, when visited by another user, executes arbitrary JavaScript code in their browser.