diff --git a/core/htmldataprocessor.js b/core/htmldataprocessor.js
index e11f02b514f..c2e77cab33a 100644
--- a/core/htmldataprocessor.js
+++ b/core/htmldataprocessor.js
@@ -230,7 +230,7 @@
 				else if ( isBlockBoundary( next ) && previous && !isBlockBoundary( previous ) ) {
 					insertBefore( next, createFiller( isOutput ) );
 				}
-			}
+			};
 		}
 
 		// Determinate whether this node is potentially a bogus node.
@@ -605,7 +605,7 @@
 		}
 	}
 	// Disable form elements editing mode provided by some browers. (#5746)
-	for ( i in { input:1,textarea:1 } ) {
+	for ( var i in { input:1,textarea:1 } ) {
 		defaultDataFilterRules.elements[ i ] = protectReadOnly;
 		defaultHtmlFilterRules.elements[ i ] = unprotectReadyOnly;
 	}
diff --git a/core/selection.js b/core/selection.js
index 858dbc5cb16..9da78b5b4c9 100644
--- a/core/selection.js
+++ b/core/selection.js
@@ -324,7 +324,7 @@
 							if ( evt.data.getTarget().is( 'html' ) ) {
 								// Limit the text selection mouse move inside of editable. (#9715)
 								outerDoc.on( 'mouseup', onSelectEnd );
-								html.on( 'mouseup', onSelectEnd )
+								html.on( 'mouseup', onSelectEnd );
 							}
 
 						});
diff --git a/plugins/clipboard/plugin.js b/plugins/clipboard/plugin.js
index 9145b510afd..7b22541e438 100644
--- a/plugins/clipboard/plugin.js
+++ b/plugins/clipboard/plugin.js
@@ -792,6 +792,8 @@
 					return false;
 				}
 			}
+
+			return true;
 		}
 
 		// Listens for some clipboard related keystrokes, so they get customized.
diff --git a/plugins/colordialog/plugin.js b/plugins/colordialog/plugin.js
index fbdbcb3841d..a21b0c5cee5 100644
--- a/plugins/colordialog/plugin.js
+++ b/plugins/colordialog/plugin.js
@@ -56,7 +56,7 @@ CKEDITOR.plugins.colordialog = {
 						} );
 				} );
 			}
-		}
+		};
 
 
 	}
diff --git a/plugins/list/plugin.js b/plugins/list/plugin.js
index 4bf7d1d02cd..1583e3e5c28 100755
--- a/plugins/list/plugin.js
+++ b/plugins/list/plugin.js
@@ -788,7 +788,7 @@
 					if ( !range.collapsed )
 						return;
 
-					var path = new CKEDITOR.dom.elementPath( range.startContainer );
+					path = new CKEDITOR.dom.elementPath( range.startContainer );
 					var isBackspace = key == 8;
 					var editable = editor.editable();
 					var walker = new CKEDITOR.dom.walker( range.clone() );
diff --git a/plugins/magicline/plugin.js b/plugins/magicline/plugin.js
index 15a9e71a953..1daafe5fc00 100644
--- a/plugins/magicline/plugin.js
+++ b/plugins/magicline/plugin.js
@@ -1400,7 +1400,7 @@
 			box.scroll = {
 				top: element.$.scrollTop,
 				left: element.$.scrollLeft
-			}
+			};
 		}
 
 		return extend({