diff --git a/performance/vip-tweaks.php b/performance/vip-tweaks.php
index 1cdee31094..3623f73867 100644
--- a/performance/vip-tweaks.php
+++ b/performance/vip-tweaks.php
@@ -150,3 +150,10 @@ function wpcom_vip_maybe_bust_available_months_cache( $post_id ) {
 		wp_cache_delete( $cache_key, 'vip' );
 	}
 }
+
+/**
+ * Set a max limit on posts_per_page for an infinite scroll request to prevent client-side abuse.
+ */
+add_filter( 'infinite_scroll_posts_per_page', function( $posts_per_page ) {
+	return min( (int) $posts_per_page, 1000 );
+} );