diff --git a/application/front/controller/admin/ShaarliAdminController.php b/application/front/controller/admin/ShaarliAdminController.php
index 3b5939bb..c26c9cbe 100644
--- a/application/front/controller/admin/ShaarliAdminController.php
+++ b/application/front/controller/admin/ShaarliAdminController.php
@@ -4,9 +4,7 @@
 
 namespace Shaarli\Front\Controller\Admin;
 
-use Shaarli\Container\ShaarliContainer;
 use Shaarli\Front\Controller\Visitor\ShaarliVisitorController;
-use Shaarli\Front\Exception\UnauthorizedException;
 use Shaarli\Front\Exception\WrongTokenException;
 use Shaarli\Security\SessionManager;
 use Slim\Http\Request;
diff --git a/application/front/controller/visitor/ShaarliVisitorController.php b/application/front/controller/visitor/ShaarliVisitorController.php
index f17c8ed3..cd27455b 100644
--- a/application/front/controller/visitor/ShaarliVisitorController.php
+++ b/application/front/controller/visitor/ShaarliVisitorController.php
@@ -78,16 +78,14 @@ protected function executeDefaultHooks(string $template): void
             'footer',
         ];
 
+        $parameters = $this->buildPluginParameters($template);
+
         foreach ($common_hooks as $name) {
             $pluginData = [];
             $this->container->pluginManager->executeHooks(
                 'render_' . $name,
                 $pluginData,
-                [
-                    'target' => $template,
-                    'loggedin' => $this->container->loginManager->isLoggedIn(),
-                    'basePath' => $this->container->basePath,
-                ]
+                $parameters
             );
             $this->assignView('plugins_' . $name, $pluginData);
         }
@@ -95,19 +93,23 @@ protected function executeDefaultHooks(string $template): void
 
     protected function executePageHooks(string $hook, array &$data, string $template = null): void
     {
-        $params = [
-            'target' => $template,
-            'loggedin' => $this->container->loginManager->isLoggedIn(),
-            'basePath' => $this->container->basePath,
-        ];
-
         $this->container->pluginManager->executeHooks(
             $hook,
             $data,
-            $params
+            $this->buildPluginParameters($template)
         );
     }
 
+    protected function buildPluginParameters(?string $template): array
+    {
+        return [
+            'target' => $template,
+            'loggedin' => $this->container->loginManager->isLoggedIn(),
+            'basePath' => $this->container->basePath,
+            'bookmarkService' => $this->container->bookmarkService
+        ];
+    }
+
     /**
      * Simple helper which prepend the base path to redirect path.
      *
diff --git a/application/plugin/PluginManager.php b/application/plugin/PluginManager.php
index 2d93cb3a..7881e3be 100644
--- a/application/plugin/PluginManager.php
+++ b/application/plugin/PluginManager.php
@@ -112,6 +112,10 @@ public function executeHooks($hook, &$data, $params = array())
             $data['_BASE_PATH_'] = $params['basePath'];
         }
 
+        if (isset($params['bookmarkService'])) {
+            $data['_BOOKMARK_SERVICE_'] = $params['bookmarkService'];
+        }
+
         foreach ($this->loadedPlugins as $plugin) {
             $hookFunction = $this->buildHookName($hook, $plugin);
 
diff --git a/doc/md/Plugin-System.md b/doc/md/Plugin-System.md
index f264e873..87a2638d 100644
--- a/doc/md/Plugin-System.md
+++ b/doc/md/Plugin-System.md
@@ -73,6 +73,26 @@ Every hook function has a `$data` parameter. Its content differs for each hooks.
 
     return $data;
 
+#### Special data
+
+Special additional data are passed to every hook through the
+`$data` parameter to give you access to additional context, and services.
+
+Complete list:
+
+  * `_PAGE_` (string): if the current hook is used to render a template, its name is passed through this additional parameter.
+  * `_LOGGEDIN_` (bool): whether the user is logged in or not.
+  * `_BASE_PATH_` (string): if Shaarli instance is hosted under a subfolder, contains the subfolder path to `index.php` (e.g. `https://domain.tld/shaarli/` -> `/shaarli/`).
+  * `_BOOKMARK_SERVICE_` (`BookmarkServiceInterface`): bookmark service instance, for advanced usage.
+
+Example:
+
+```php
+if ($data['_PAGE_'] === TemplatePage::LINKLIST && $data['LOGGEDIN'] === true) {
+    // Do something for logged in users when the link list is rendered
+}
+```
+
 #### Filling templates placeholder
 
 Template placeholders are displayed in template in specific places.
@@ -95,7 +115,7 @@ When a page is displayed, every variable send to the template engine is passed t
 
 The data contained by this array can be altered before template rendering.
 
-For exemple, in linklist, it is possible to alter every title:
+For example, in linklist, it is possible to alter every title:
 
 ```php
 // mind the reference if you want $data to be altered
@@ -156,8 +176,7 @@ Allow plugin to add content in page headers.
 
 `$data` is an array containing:
 
-- `_PAGE_`: current target page (eg: `linklist`, `picwall`, etc.).
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -185,8 +204,7 @@ Allow plugin to include their own CSS files.
 
 `$data` is an array containing:
 
-- `_PAGE_`: current target page (eg: `linklist`, `picwall`, etc.).
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -208,8 +226,7 @@ Allow plugin to add content in page footer and include their own JS files.
 
 `$data` is an array containing:
 
-- `_PAGE_`: current target page (eg: `linklist`, `picwall`, etc.).
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -236,8 +253,8 @@ It allows to add content at the begining and end of the page, after every link d
 
 `$data` is an array containing:
 
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
-- All templates data, including links.
+  - All templates data, including links.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -271,7 +288,8 @@ Allow to add fields in the form, or display elements.
 
 `$data` is an array containing:
 
-- All templates data.
+  - All templates data.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -293,7 +311,8 @@ Allow to add content at the end of the page.
 
 `$data` is an array containing:
 
-- All templates data.
+  - All templates data.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -315,8 +334,8 @@ Allow to add content at the top and bottom of the page.
 
 `$data` is an array containing:
 
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
-- All templates data.
+  - All templates data.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -339,8 +358,8 @@ Allow to add content at the top and bottom of the page.
 
 `$data` is an array containing:
 
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
-- All templates data.
+  - All templates data.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -368,8 +387,8 @@ Allow to add content at the top and bottom of the page.
 
 `$data` is an array containing:
 
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
-- All templates data.
+  - All templates data.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -394,8 +413,8 @@ Allow to add content at the top and bottom of the page, the bottom of each link
 
 `$data` is an array containing:
 
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
-- All templates data, including links.
+  - All templates data, including links.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -420,9 +439,8 @@ Allow to add tags in the feed, either in the header or for each items. Items (li
 
 `$data` is an array containing:
 
-- `_LOGGEDIN_`: true if user is logged in, false otherwise.
-- `_PAGE_`: containing either `rss` or `atom`.
-- All templates data, including links.
+  - All templates data, including links.
+  - [Special data](#special-data)
 
 ##### Template placeholders
 
@@ -456,6 +474,8 @@ Allow to alter the link being saved in the datastore.
 - created
 - updated
 
+Also [special data](#special-data).
+
 
 #### delete_link
 
@@ -465,7 +485,7 @@ Allow to execute any action before the link is actually removed from the datasto
 
 ##### Data
 
-`$data` is an array containing the link being saved:
+`$data` is an array containing the link being deleted:
 
 - id
 - title
@@ -477,6 +497,7 @@ Allow to execute any action before the link is actually removed from the datasto
 - created
 - updated
 
+Also [special data](#special-data).
 
 #### save_plugin_parameters
 
@@ -492,6 +513,7 @@ For example it is used to update the CSS file of the `default_colors` plugins.
 So if the plugin has a parameter called `MYPLUGIN_PARAMETER`,
 the array will contain an entry with `MYPLUGIN_PARAMETER` as a key.
 
+Also [special data](#special-data).
 
 ## Guide for template designer