Fix/security input validation

CHANGELOG.md

@@ -164,6 +164,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed contact us form position to maintain structure on bigger displays
 - Fixed non-interactive form input field bug on Contact Us page
 - Bumped Next.js from v15.3.2 to v15.3.8 to fix React server component's vulnerability
+- Fixed XSS vulnerability and added client-side email format validation in NewsletterForm
+- Escaped user inputs to prevent HTML injection
+- Strengthened server-side validation to block malformed inputs before reCAPTCHA
 
 ### Changed
 

components/NewsletterSubscribe/NewsletterForm/index.js

@@ -71,6 +71,12 @@ const NewsletterForm = ({ getReCaptchaToken }) => {
       return null;
     }
 
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    if (!emailRegex.test(email)) {
+      setError('Please enter a valid email address');
+      return null;
+    }
+
     const confirmValidateRecaptcha = await validateReCaptcha();
     if (confirmValidateRecaptcha) {
       setName('');
@@ -153,18 +159,12 @@ const NewsletterForm = ({ getReCaptchaToken }) => {
               <div className={styles.formSending}>Sending...</div>
             )}
             {status === 'error' || error ? (
-              <div
-                className={styles.formError}
-                dangerouslySetInnerHTML={{
-                  __html: error || getMessage(message),
-                }}
-              />
+              <div className={styles.formError}>
+                {error || getMessage(message)}
+              </div>
             ) : null}
             {status === 'success' && status !== 'error' && !error && (
-              <div
-                className={styles.formSuccess}
-                dangerouslySetInnerHTML={{ __html: decode(message) }}
-              />
+              <div className={styles.formSuccess}>{decode(message)}</div>
             )}
           </div>
         </div>

next.config.js

@@ -1,11 +1,12 @@
-const withPWA = require('next-pwa')({
-  dest: 'public',
-  register: true,
-  skipWaiting: true,
-  disable: process.env.NODE_ENV === 'development',
-});
+const withPWA = require('next-pwa');
 
 module.exports = withPWA({
+  pwa: {
+    dest: 'public',
+    register: true,
+    skipWaiting: true,
+    disable: process.env.NODE_ENV === 'development',
+  },
   compiler: {
     styledComponents: {
       ssr: true,

package.json

@@ -21,15 +21,15 @@
   "dependencies": {
     "@sendgrid/mail": "^8.1.5",
     "html-entities": "^2.3.2",
-    "next": "15.3.8",
-    "next-pwa": "^5.6.0",
+    "next": "^15.5.14",
+    "next-pwa": "^2.0.2",
     "node-mailjet": "^6.0.9",
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "react-google-recaptcha": "^3.1.0",
     "react-hook-form": "^7.35.0",
     "sass": "^1.35.1",
-    "swiper": "^11.2.6"
+    "swiper": "^12.1.3"
   },
   "devDependencies": {
     "husky": "^9.1.7",

pages/api/sendEmail.js

@@ -1,6 +1,7 @@
 // Sends email to hello@webdevpath.co when user submit the form in "Contact Us" page
 
 import { Client } from 'node-mailjet';
+import { encode } from 'html-entities';
 
 const mailjet = new Client({
   apiKey: process.env.MAILJET_API_KEY,
@@ -17,6 +18,11 @@ export default async (email, name, subject, message, subscribe) => {
   const mailjetEmail = 'support@webdevpath.co';
 
   try {
+    const safeName = encode(name);
+    const safeEmail = encode(email);
+    const safeSubject = encode(subject);
+    const safeMessage = encode(message);
+
     const data = {
       Messages: [
         {
@@ -29,12 +35,12 @@ export default async (email, name, subject, message, subscribe) => {
               Email: receiverEmail,
             },
           ],
-          Subject: `New message from ${name} via webdevpath.co 'Contact Us' Form`,
+          Subject: `New message from ${safeName} via webdevpath.co 'Contact Us' Form`,
           HTMLPart: `
-            <b>Name:</b> ${name} <br/>
-            <b>Email:</b> <a href='mailto:${email}'>${email}</a><br/><br/>
-            <u><b>Subject:</b> ${subject}</u><br/>
-            <b>Message:</b> ${message} <br/>
+            <b>Name:</b> ${safeName} <br/>
+            <b>Email:</b> <a href='mailto:${safeEmail}'>${safeEmail}</a><br/><br/>
+            <u><b>Subject:</b> ${safeSubject}</u><br/>
+            <b>Message:</b> ${safeMessage} <br/>
             <b>Subscribe?:</b> ${subscribe ? 'Yes' : 'No'}
           `,
         },

pages/api/validateReCaptcha.js

@@ -19,6 +19,28 @@ export default async function handler(req, res) {
       });
     }
 
+    // Validate email format
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    if (!emailRegex.test(email)) {
+      return res.status(422).json({
+        message: 'Invalid email format',
+      });
+    }
+
+    // Validate name length (max 100 characters)
+    if (name.length > 100) {
+      return res.status(422).json({
+        message: 'Name must be 100 characters or less',
+      });
+    }
+
+    // Validate message length if provided (max 5000 characters)
+    if (message && message.length > 5000) {
+      return res.status(422).json({
+        message: 'Message must be 5000 characters or less',
+      });
+    }
+
     try {
       // Ping the google recaptcha verify API to verify the captcha code you received
       const response = await fetch(