fix(editor): Prevent clipboard XSS injection

packages/editor-ui/src/composables/__tests__/useClipboard.test.ts

@@ -1,4 +1,4 @@
-import { render } from '@testing-library/vue';
+import { render, within } from '@testing-library/vue';
 import userEvent from '@testing-library/user-event';
 import { defineComponent, h, ref } from 'vue';
 import { useClipboard } from '@/composables/useClipboard';
@@ -8,9 +8,13 @@ const testValue = 'This is a test';
 const TestComponent = defineComponent({
 	setup() {
 		const pasted = ref('');
+		const htmlContent = ref<HTMLElement>();
 		const clipboard = useClipboard({
 			onPaste(data) {
 				pasted.value = data;
+				if (htmlContent.value) {
+					htmlContent.value.innerHTML = data;
+				}
 			},
 		});
 
@@ -23,6 +27,7 @@ const TestComponent = defineComponent({
 					},
 				}),
 				h('div', { 'data-test-id': 'paste' }, pasted.value),
+				h('div', { 'data-test-id': 'xss-attack', ref: htmlContent }),
 			]);
 	},
 });
@@ -68,4 +73,12 @@ describe('useClipboard()', () => {
 			expect(pasteElement.textContent).toEqual(testValue);
 		});
 	});
+
+	it('sanitizes HTML', async () => {
+		const unsafeHtml = 'https://www.ex.com/sfefdfd<img/src/onerror=alert(1)>fdf/xdfef.json';
+		const { getByTestId } = render(TestComponent);
+
+		await userEvent.paste(unsafeHtml);
+		expect(within(getByTestId('xss-attack')).queryByRole('img')).not.toBeInTheDocument();
+	});
 });

packages/editor-ui/src/composables/useClipboard.ts

@@ -1,6 +1,7 @@
 import { onBeforeUnmount, onMounted, ref } from 'vue';
 import { useClipboard as useClipboardCore } from '@vueuse/core';
 import { useDebounce } from '@/composables/useDebounce';
+import { sanitizeIfString } from '@/utils/htmlUtils';
 
 type ClipboardEventFn = (data: string, event?: ClipboardEvent) => void;
 
@@ -42,7 +43,7 @@ export function useClipboard(
 
 		const clipboardData = event.clipboardData;
 		if (clipboardData !== null) {
-			const clipboardValue = clipboardData.getData('text/plain');
+			const clipboardValue = sanitizeIfString(clipboardData.getData('text/plain'));
 			onPasteCallback.value(clipboardValue, event);
 		}
 	}

packages/editor-ui/src/composables/useMessage.ts

@@ -1,5 +1,6 @@
 import type { ElMessageBoxOptions, Action, MessageBoxInputData } from 'element-plus';
 import { ElMessageBox as MessageBox } from 'element-plus';
+import { sanitizeIfString } from '@/utils/htmlUtils';
 
 export type MessageBoxConfirmResult = 'confirm' | 'cancel';
 
@@ -28,11 +29,13 @@ export function useMessage() {
 		};
 
 		if (typeof configOrTitle === 'string') {
-			return await MessageBox.alert(message, configOrTitle, resolvedConfig).catch(
+			return await MessageBox.alert(sanitizeIfString(message), configOrTitle, resolvedConfig).catch(
 				handleCancelOrClose,
 			);
 		}
-		return await MessageBox.alert(message, resolvedConfig).catch(handleCancelOrClose);
+		return await MessageBox.alert(sanitizeIfString(message), resolvedConfig).catch(
+			handleCancelOrClose,
+		);
 	}
 
 	async function confirm(
@@ -50,12 +53,16 @@ export function useMessage() {
 		};
 
 		if (typeof configOrTitle === 'string') {
-			return await MessageBox.confirm(message, configOrTitle, resolvedConfig).catch(
-				handleCancelOrClose,
-			);
+			return await MessageBox.confirm(
+				sanitizeIfString(message),
+				sanitizeIfString(configOrTitle),
+				resolvedConfig,
+			).catch(handleCancelOrClose);
 		}
 
-		return await MessageBox.confirm(message, resolvedConfig).catch(handleCancelOrClose);
+		return await MessageBox.confirm(sanitizeIfString(message), resolvedConfig).catch(
+			handleCancelOrClose,
+		);
 	}
 
 	async function prompt(
@@ -70,11 +77,15 @@ export function useMessage() {
 		};
 
 		if (typeof configOrTitle === 'string') {
-			return await MessageBox.prompt(message, configOrTitle, resolvedConfig).catch(
-				handleCancelOrClosePrompt,
-			);
+			return await MessageBox.prompt(
+				sanitizeIfString(message),
+				sanitizeIfString(configOrTitle),
+				resolvedConfig,
+			).catch(handleCancelOrClosePrompt);
 		}
-		return await MessageBox.prompt(message, resolvedConfig).catch(handleCancelOrClosePrompt);
+		return await MessageBox.prompt(sanitizeIfString(message), resolvedConfig).catch(
+			handleCancelOrClosePrompt,
+		);
 	}
 
 	return {

packages/editor-ui/src/utils/htmlUtils.ts

@@ -37,6 +37,17 @@ export function sanitizeHtml(dirtyHtml: string) {
 	return sanitizedHtml;
 }
 
+/**
+ * Checks if the input is a string and sanitizes it by removing or escaping harmful characters,
+ * returning the original input if it's not a string.
+ */
+export const sanitizeIfString = <T>(message: T): string | T => {
+	if (typeof message === 'string') {
+		return sanitizeHtml(message);
+	}
+	return message;
+};
+
 export function setPageTitle(title: string) {
 	window.document.title = title;
 }