2 files changed, 25 insertions, 3 deletions
diff --git a/phpBB/phpbb/path_helper.php b/phpBB/phpbb/path_helper.php
index 154361ef64..5b6db35f23 100644
--- a/phpBB/phpbb/path_helper.php
+++ b/phpBB/phpbb/path_helper.php
@@ -496,4 +496,17 @@ class path_helper
 
 		return $page;
 	}
+
+	/**
+	 * Tells if the router is currently in use (if the current page is a route or not)
+	 *
+	 * @return bool
+	 */
+	public function is_router_used()
+	{
+		// Script name URI (e.g. phpBB/app.php)
+		$script_name = $this->symfony_request->getScriptName();
+
+		return basename($script_name) === 'app.' . $this->php_ext;
+	}
 }
diff --git a/phpBB/phpbb/session.php b/phpBB/phpbb/session.php
index c5b50c2b07..6b5b8f2625 100644
--- a/phpBB/phpbb/session.php
+++ b/phpBB/phpbb/session.php
@@ -91,9 +91,18 @@ class session
 			$page_name .= str_replace('%2F', '/', urlencode($symfony_request_path));
 		}
 
-		// current directory within the phpBB root (for example: adm)
-		$root_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath($root_path)));
-		$page_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath('./')));
+		if (substr($root_path, 0, 2) === './' && strpos($root_path, '..') === false)
+		{
+			$root_dirs = explode('/', str_replace('\\', '/', rtrim($root_path, '/')));
+			$page_dirs = explode('/', str_replace('\\', '/', '.'));
+		}
+		else
+		{
+			// current directory within the phpBB root (for example: adm)
+			$root_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath($root_path)));
+			$page_dirs = explode('/', str_replace('\\', '/', $phpbb_filesystem->realpath('./')));
+		}
+
 		$intersection = array_intersect_assoc($root_dirs, $page_dirs);
 
 		$root_dirs = array_diff_assoc($root_dirs, $intersection);