diff --git a/Output.php b/Output.php
index 913db25..8b339f7 100644
--- a/Output.php
+++ b/Output.php
@@ -562,10 +562,37 @@ class Output
      */
     protected function itemWebUrl($item, $cachbuster = false)
     {
-        if (str_ends_with($this->webdir, '=')) {
-            $url = $this->webdir . rawurlencode($item['local']);
+        $webdir = $this->webdir;
+
+        // When using the built-in file-serving endpoint, include the current page id
+        // so file.php can enforce DokuWiki ACLs for that page.
+        if (
+            is_string($webdir)
+            && $webdir !== ''
+            && strpos($webdir, 'lib/plugins/luxtools/file.php') !== false
+            && strpos($webdir, 'id=') === false
+        ) {
+            global $ID;
+            $pageId = isset($ID) ? (string)$ID : '';
+            if ($pageId !== '') {
+                if (function_exists('cleanID')) {
+                    $pageId = (string)cleanID($pageId);
+                }
+                if ($pageId !== '') {
+                    $encoded = rawurlencode($pageId);
+                    if (strpos($webdir, '&file=') !== false) {
+                        $webdir = str_replace('&file=', '&id=' . $encoded . '&file=', $webdir);
+                    } elseif (strpos($webdir, '?file=') !== false) {
+                        $webdir = str_replace('?file=', '?id=' . $encoded . '&file=', $webdir);
+                    }
+                }
+            }
+        }
+
+        if (str_ends_with($webdir, '=')) {
+            $url = $webdir . rawurlencode($item['local']);
         } else {
-            $url = $this->webdir . $item['local'];
+            $url = $webdir . $item['local'];
         }
 
         if ($cachbuster) {
diff --git a/Path.php b/Path.php
index 40eee0e..0d4e510 100644
--- a/Path.php
+++ b/Path.php
@@ -49,11 +49,6 @@ class Path
                 $alias = static::cleanPath($line);
                 $paths[$lastRoot]['alias'] = $alias;
                 $paths[$alias] = &$paths[$lastRoot]; // alias references the original
-            } elseif (str_starts_with($line, 'W>')) {
-                // this is a web path for the last read root
-                $line = trim(substr($line, 2));
-                if (!isset($paths[$lastRoot])) continue; // no last path, no web path
-                $paths[$lastRoot]['web'] = $line;
             } else {
                 // this is a new path
                 $line = static::cleanPath($line);
diff --git a/README.md b/README.md
index f1487bf..25e07a0 100644
--- a/README.md
+++ b/README.md
@@ -31,15 +31,11 @@ It also ships a small file-serving endpoint (`lib/plugins/luxtools/file.php`) us
 to deliver files and generate cached thumbnails.
 
 
-## Important security note
+##  Note on security
 
 The file-serving endpoint (`lib/plugins/luxtools/file.php`) runs inside DokuWiki
-and can enforce a simple access restriction based on the currently logged-in
-user.
-
-This is intentionally *not* full per-page ACL integration; it is a pragmatic
-allowlist to avoid “anyone with a guessed URL can fetch the file”.
-
+and enforces access via per-page ACL: the requester must have at least read
+access to the wiki page that rendered the link.
 
 ## Installation
 
@@ -60,33 +56,25 @@ luxtools is configured via its dedicated admin page:
 
 Key settings:
 
-- **access_allow**
-  Allowed users/groups for the file-serving endpoint.
-  - Entries can be separated by newlines, commas, or whitespace.
-  - Use `@group` to allow a whole group.
-  - Leave empty to allow any authenticated (logged-in) user.
-  - Anonymous users are always denied.
-
 - **paths**
   Allowed base filesystem roots (one per line). Each root can be followed by:
   - `A> /Alias/` (optional) alias used in wiki syntax and open links
-  - `W> https://...` (optional) web base URL used for links instead of `file.php`
 
   Example:
 
   ```
   /srv/share/Datascape/
   A> /Scape/
-  W> https://files.example.example/Datascape/
   ```
 
-  If no `W>` line is configured, luxtools links will use the plugin endpoint:
+  luxtools links use the plugin endpoint:
 
   `lib/plugins/luxtools/file.php?root=...&file=...`
 
-  Note: if you configure a `W>` web URL to an external file server, that server
-  must enforce access itself; DokuWiki ACLs and `access_allow` only apply to
-  `file.php`.
+  The generated URLs also include the current wiki page id (`id=...`) so
+  `file.php` can enforce ACLs for the host page.
+
+
 
 - **scratchpad_paths**
   Scratchpad file map (one file path per line, followed by an `A>` alias line).
diff --git a/ScratchpadMap.php b/ScratchpadMap.php
index 2c8165b..11c590b 100644
--- a/ScratchpadMap.php
+++ b/ScratchpadMap.php
@@ -75,11 +75,6 @@ class ScratchpadMap
                 continue;
             }
 
-            // Ignore W> lines for compatibility with the Path config style
-            if (str_starts_with($line, 'W>')) {
-                continue;
-            }
-
             // Treat as file path (no trailing slash enforced)
             $filePath = Path::cleanPath($line, false);
             if ($filePath === '' || str_ends_with($filePath, '/')) {
diff --git a/_test/PathTest.php b/_test/PathTest.php
index 4c1d738..6ecbf4a 100644
--- a/_test/PathTest.php
+++ b/_test/PathTest.php
@@ -27,7 +27,6 @@ C:\\xampp\\htdocs\\wiki\\
 /linux/file/path/
 /linux/another/path/../..//another/blargh/../path
   A> alias
-  W> webfoo
 EOT
         );
     }
@@ -53,12 +52,12 @@ EOT
             '/linux/another/path/' => [
                 'root' => '/linux/another/path/',
                 'alias' => 'alias/',
-                'web' => 'webfoo',
+                'web' => '/lib/plugins/luxtools/file.php?root=%2Flinux%2Fanother%2Fpath%2F&file=',
             ],
             'alias/' => [
                 'root' => '/linux/another/path/',
                 'alias' => 'alias/',
-                'web' => 'webfoo',
+                'web' => '/lib/plugins/luxtools/file.php?root=%2Flinux%2Fanother%2Fpath%2F&file=',
             ],
         ];
 
diff --git a/_test/ScratchpadMapTest.php b/_test/ScratchpadMapTest.php
index 85707c0..8346450 100644
--- a/_test/ScratchpadMapTest.php
+++ b/_test/ScratchpadMapTest.php
@@ -22,7 +22,6 @@ A> start
 
 C:\\pads\\notes.md
 A> notes
-W> ignored
 
 \\\\server\\share\\pads\\team.txt
 A> team
diff --git a/_test/SyntaxTest.php b/_test/SyntaxTest.php
index 1da276c..2db7ac2 100644
--- a/_test/SyntaxTest.php
+++ b/_test/SyntaxTest.php
@@ -29,7 +29,8 @@ class plugin_luxtools_test extends DokuWikiTest
         parent::setUp();
 
         // Setup config so that access to the TMP directory will be allowed
-        $conf ['plugin']['luxtools']['paths'] = TMP_DIR . '/filelistdata/' . "\n" . 'A> /Scape' . "\n" . 'W> http://localhost/';
+        // Use the built-in file.php endpoint.
+        $conf ['plugin']['luxtools']['paths'] = TMP_DIR . '/filelistdata/' . "\n" . 'A> /Scape';
 
     }
 
@@ -244,6 +245,27 @@ class plugin_luxtools_test extends DokuWikiTest
         $this->assertStringContainsString('height="150"', $xhtml);
     }
 
+    /**
+     * Ensure the built-in file endpoint includes the host page id so file.php can
+     * enforce per-page ACL.
+     */
+    public function test_file_links_include_page_id_for_acl()
+    {
+        global $ID;
+        $ID = 'luxtools:acltest';
+
+        $instructions = p_get_instructions('{{files>' . TMP_DIR . '/filelistdata/*&style=list&direct=1}}');
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $doc = new Document();
+        $doc->html($xhtml);
+
+        $href = (string)$doc->find('div.luxtools-plugin a')->first()->attr('href');
+        $this->assertNotSame('', $href);
+        $this->assertStringContainsString('lib/plugins/luxtools/file.php', $href);
+        $this->assertStringContainsString('id=luxtools%3Aacltest', $href);
+    }
+
     /**
      * This function checks that the open syntax renders an inline link.
      */
diff --git a/admin/main.php b/admin/main.php
index ccae556..447f7d7 100644
--- a/admin/main.php
+++ b/admin/main.php
@@ -10,7 +10,6 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
 {
     /** @var string[] */
     protected $configKeys = [
-        'access_allow',
         'paths',
         'scratchpad_paths',
         'allow_in_comments',
@@ -49,10 +48,6 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
         }
 
         $newConf = [];
-        $accessAllow = $INPUT->str('access_allow');
-        $accessAllow = str_replace(["\r\n", "\r"], "\n", $accessAllow);
-        $newConf['access_allow'] = $accessAllow;
-
         // Normalize newlines to "\n" for consistent parsing
         $paths = $INPUT->str('paths');
         $paths = str_replace(["\r\n", "\r"], "\n", $paths);
@@ -93,12 +88,6 @@ class admin_plugin_luxtools_main extends DokuWiki_Admin_Plugin
         echo '<fieldset>';
         echo '<legend>' . hsc($this->getLang('legend')) . '</legend>';
 
-        // access_allow: multiline (users/groups)
-        $accessAllow = (string)$this->getConf('access_allow');
-        echo '<label class="block"><span>' . hsc($this->getLang('access_allow')) . '</span><br />';
-        echo '<textarea name="access_allow" rows="3" cols="80" class="edit">' . hsc($accessAllow) . '</textarea>';
-        echo '</label><br />';
-
         // paths: multiline textarea
         $paths = (string)$this->getConf('paths');
         echo '<label class="block"><span>' . hsc($this->getLang('paths')) . '</span><br />';
diff --git a/conf/default.php b/conf/default.php
index f857255..db9d9a9 100644
--- a/conf/default.php
+++ b/conf/default.php
@@ -19,8 +19,3 @@ $conf['gallery_thumb_scale'] = 1;
 
 // Local client service used by {{open>...}}.
 $conf['open_service_url'] = 'http://127.0.0.1:8765';
-
-// Access allowlist for the file-serving endpoint (file.php).
-// Empty means: any authenticated user may access. Anonymous users are denied.
-// Use '@group' to allow a whole group.
-$conf['access_allow'] = '';
diff --git a/file.php b/file.php
index bbed9bf..04077f3 100644
--- a/file.php
+++ b/file.php
@@ -13,90 +13,35 @@ global $INPUT;
 $syntax = plugin_load('syntax', 'luxtools');
 if (!$syntax) die('plugin disabled?');
 
-/**
- * Enforce a simple allowlist based access check.
- *
- * The allowlist supports entries separated by commas, whitespace or newlines.
- * - "alice" allows a specific user
- * - "@admins" allows a DokuWiki group
- *
- * If the allowlist is empty, any authenticated user is allowed.
- * Anonymous access is always denied.
- *
- * @param string $allowListRaw
- * @return void
- */
-function luxtools_require_access(string $allowListRaw): void
-{
-    global $INPUT, $USERINFO;
-
-    // We need a logged-in user for any access.
-    $user = '';
-    try {
-        $user = (string)$INPUT->server->str('REMOTE_USER');
-    } catch (Throwable $e) {
-        $user = (string)($_SERVER['REMOTE_USER'] ?? '');
-    }
-    $user = trim($user);
-
-    if ($user === '') {
-        header('Content-Type: text/plain; charset=utf-8');
-        http_status(403);
-        echo 'forbidden';
-        exit;
-    }
-
-    $allowListRaw = trim($allowListRaw);
-    if ($allowListRaw === '') {
-        return; // any authenticated user
-    }
-
-    $tokens = preg_split('/[\s,;]+/', $allowListRaw, -1, PREG_SPLIT_NO_EMPTY);
-    if (!is_array($tokens) || $tokens === []) {
-        // If configured but empty after parsing, be conservative.
-        header('Content-Type: text/plain; charset=utf-8');
-        http_status(403);
-        echo 'forbidden';
-        exit;
-    }
-
-    $groups = [];
-    if (is_array($USERINFO) && isset($USERINFO['grps']) && is_array($USERINFO['grps'])) {
-        $groups = $USERINFO['grps'];
-    }
-
-    $allowed = false;
-    foreach ($tokens as $t) {
-        $t = trim((string)$t);
-        if ($t === '') continue;
-
-        if ($t[0] === '@') {
-            $g = trim(substr($t, 1));
-            if ($g !== '' && in_array($g, $groups, true)) {
-                $allowed = true;
-                break;
-            }
-        } else {
-            if ($t === $user) {
-                $allowed = true;
-                break;
-            }
-        }
-    }
-
-    if (!$allowed) {
-        header('Content-Type: text/plain; charset=utf-8');
-        http_status(403);
-        echo 'forbidden';
-        exit;
-    }
-}
-
 $pathUtil = new Path($syntax->getConf('paths'));
 $path = $INPUT->str('root') . $INPUT->str('file');
 
-// Enforce access before doing any filesystem work.
-luxtools_require_access((string)$syntax->getConf('access_allow'));
+// Require the user to be able to read the page that rendered the link.
+$pageId = (string)$INPUT->str('id');
+if (function_exists('cleanID')) {
+    $pageId = (string)cleanID($pageId);
+}
+
+if ($pageId === '') {
+    header('Content-Type: text/plain; charset=utf-8');
+    http_status(403);
+    echo 'forbidden';
+    exit;
+}
+
+if (!function_exists('auth_quickaclcheck') || !defined('AUTH_READ')) {
+    header('Content-Type: text/plain; charset=utf-8');
+    http_status(403);
+    echo 'forbidden';
+    exit;
+}
+
+if (auth_quickaclcheck($pageId) < AUTH_READ) {
+    header('Content-Type: text/plain; charset=utf-8');
+    http_status(403);
+    echo 'forbidden';
+    exit;
+}
 
 /**
  * Send a file to the client with basic caching headers.
diff --git a/lang/de/lang.php b/lang/de/lang.php
index 3f0896a..e480a2d 100644
Binary files a/lang/de/lang.php and b/lang/de/lang.php differ
diff --git a/lang/de/settings.php b/lang/de/settings.php
index 391fba1..48178cb 100644
Binary files a/lang/de/settings.php and b/lang/de/settings.php differ
diff --git a/lang/en/lang.php b/lang/en/lang.php
index 7d85da7..6b6da56 100644
--- a/lang/en/lang.php
+++ b/lang/en/lang.php
@@ -25,9 +25,8 @@ $lang['saved'] = 'Settings saved.';
 $lang['err_save'] = 'Could not save settings. Please check write permissions for conf/local.php.';
 $lang['err_security'] = 'Security token mismatch. Please retry.';
 
-$lang['access_allow'] = 'Allowed users/groups for file access (one per line or comma-separated). Use @group for groups. Leave empty to allow any logged-in user.';
 
-$lang['paths'] = 'Allowed base paths (one per line). Optional: follow a path with A> alias and W> web URL.';
+$lang['paths'] = 'Allowed base paths (one per line). Optional: follow a path with A> alias.';
 $lang['scratchpad_paths'] = 'Scratchpad files (one per line). Each file path must include the extension. Use a following A> line to set the pad name used in the wiki.';
 $lang['allow_in_comments'] = 'Whether to allow luxtools syntax (files/images/directory/scratchpad) to be used in comments.';
 $lang['defaults'] = 'Default options. Use the same syntax as in inline configuration.';
diff --git a/lang/en/settings.php b/lang/en/settings.php
index e439572..b44bb2c 100644
--- a/lang/en/settings.php
+++ b/lang/en/settings.php
@@ -1,6 +1,6 @@
 <?php
 
-$lang['paths'] = 'Allowed base paths (one per line). Optional: follow a path with A> alias and W> web URL.';
+$lang['paths'] = 'Allowed base paths (one per line). Optional: follow a path with A> alias.';
 $lang['scratchpad_paths'] = 'Scratchpad files (one per line). Each file path must include the extension; use a following A> line to set the pad name used in the wiki.';
 $lang['allow_in_comments'] = 'Whether to allow luxtools syntax (files/images/directory/scratchpad) to be used in comments.';
 $lang['defaults'] = 'Default options. Use the same syntax as in inline configuration';