1 files changed, 5 insertions, 0 deletions
diff --git a/lib/base.php b/lib/base.php
index fd9a1d41121..ff95a87e438 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -231,6 +231,11 @@ class OC {
 				header("Location: $url");
 				exit();
 			}
+		} else {
+			// Invalidate HSTS headers
+			if (OC_Request::serverProtocol() === 'https') {
+				header('Strict-Transport-Security: max-age=0');
+			}
 		}
 	}