thumb: validate path before extracting missing parts

[minimedit.git] / thumb / index.php

diff --git a/thumb/index.php b/thumb/index.php
index 104e1df53009d99187019e7129e615d9d12c19ac..7de4f456939152bd931f61a15094b4a061ebbe08 100644 (file)
--- a/thumb/index.php
+++ b/thumb/index.php
@@ -1,5 +1,10 @@
 <?php
-list ($size, $imgpath) = explode('/', ltrim($Page->path, '/'), 2);
+if (!$User) return;
+$imgpath = ltrim($Page->path, '/');
+if (!preg_match('{^[0-9x]+/}', $imgpath)) {
+       return;
+}
+list ($size, $imgpath) = explode('/', $imgpath, 2);
 $imgpath = preg_replace('{^(?=[0-9]+/)}', 'data/', $imgpath, 1);
 
 if (!file_exists($imgpath)) {