Pages containing captioned images won't load properly

There are no new plugins installed and no new version changes when this problem started happening: pages that contain captioned images will not load past the headline, BUT ONLY FOR LOGGED-IN USERS. (Non logged in viewers can see the page fine)

I am using CosmoThemes News24. The post page seems to quit loading when it runs into this code:

<?php
			$args = array(
				'numberposts' => -1,
				'post_type' => 'attachment',
				'status' => 'publish',
				'post_mime_type' => 'image',
				'post_parent' => $post -> ID
				);

			$images = &get_children($args);

			if( has_post_thumbnail () ){
				if( isset( $images[ get_post_thumbnail_id() ] ) ){
					$data = $images[ get_post_thumbnail_id() ];
				}else{
					$args['post_parent'] = 0;
					$images = &get_children($args);
					$data = $images[ get_post_thumbnail_id() ];
				}

		?>

		<?php
			}
		?>

I don’t see any signs that we’ve been hacked, but it’s possible I suppose. Does anyone know why this would suddenly happen? Another symptom is that the logged-in-users’ Dashboard bar won’t load either.