CVE-2026-33479: AVideo has PHP Code Injection via eval() in Gallery saveSort.json.php Exploitable Through CSRF Against Admin

The Gallery plugin’s saveSort.json.php endpoint passes unsanitized user input from $_REQUEST['sections'] array values directly into PHP’s eval() function. While the endpoint is gated behind User::isAdmin(), it has no CSRF token validation. Combined with AVideo’s explicit SameSite=None session cookie configuration, an attacker can exploit this via cross-site request forgery to achieve unauthenticated remote code execution — requiring only that an admin visits an attacker-controlled page.