The Gallery WordPress plugin before 2.0.0 does not sanitise and escape a parameter before outputting it back in the response of an AJAX action (available to both unauthenticated and authenticated users), leading to a Reflected Cross-Site Scripting issue
El plugin Gallery de WordPress versiones anteriores a 2.0.0, no sanea y escapa de un parámetro antes de devolverlo en la respuesta de una acción AJAX (disponible tanto para usuarios no autentificados como autentificados), conlleva un problema de tipo Cross-Site Scripting Reflejado
The Gallery – Image and Video Gallery with Thumbnails plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 1.9.9 due to insufficient input sanitization and output escaping on the gallery_current_index parameter supplied via the wp_ajax_wpda_gall_load_image_info AJAX action. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
