From 71a2d856c6d70fea67275eb2d92230e0c455b1bc Mon Sep 17 00:00:00 2001
From: Case Duckworth
Date: Fri, 20 Jan 2023 15:36:44 -0600
Subject: Some hardening

---
 superstack.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/superstack.php b/superstack.php
index c02ae6d..8f8b2a0 100644
--- a/superstack.php
+++ b/superstack.php
@@ -1,5 +1,11 @@
 <?php
 $site = urldecode($_GET['page']);
+
+if(!empty($site) && !preg_match("substack\.com", $site)) {
+	http_response_code(403);
+	exit
+}
+
 $ch = curl_init($site);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 $page = curl_exec($ch);
-- 
cgit 1.4.1-21-gabe81