Refactor theme and language validation to use basic format checks instead of allowlists

README.md

@@ -11,7 +11,7 @@ A modern, self-hosted BigBlueButton frontend with beautiful themes, federation,
 
 ### Core Features
 - 🎥 **Video Conferencing** – Integrated BigBlueButton support for professional video meetings
-- 🎨 **15+ Themes** – Dracula, Nord, Catppuccin, Rosé Pine, Gruvbox, and more (extensible via volume mount)
+- 🎨 **15+ Themes** – Dracula, Nord, Catppuccin, Rosé Pine, Gruvbox, and more
 - 📝 **Room Management** – Create unlimited rooms with custom settings, access codes, and moderator codes
 - 🔐 **User Management** – Registration, login, role-based access control (Admin/User)
 - 📹 **Recording Management** – View, publish, and delete meeting recordings per room
@@ -42,7 +42,7 @@ A modern, self-hosted BigBlueButton frontend with beautiful themes, federation,
 
 ### Security
 - 🛡️ **Comprehensive Rate Limiting** – Login, register, profile, avatar, guest-join, and federation endpoints
-- 🔒 **Input Validation** – Email format, field length limits, theme/language allowlists, color format validation
+- 🔒 **Input Validation** – Email format, field length limits, ID format checks, color format validation
 - 🕐 **Timing-Safe Comparisons** – Access codes and moderator codes compared with `crypto.timingSafeEqual`
 - 📏 **Streaming Upload Limits** – Avatar (5 MB) and presentation (50 MB) uploads reject early without buffering
 - 🧹 **XSS Prevention** – HTML-escaped emails, XML-escaped BBB parameters, SVG sanitization
@@ -186,7 +186,7 @@ redlight/
 │   ├── i18n/              # Translations (DE, EN)
 │   ├── pages/             # Page components
 │   ├── services/          # API client
-│   ├── themes/            # Tailwind theme config (volume-mountable)
+│   ├── themes/            # Tailwind theme config
 │   └── main.jsx           # Frontend entry point
 ├── public/                # Static assets
 ├── uploads/               # User avatars, branding & presentations (runtime)
@@ -206,7 +206,7 @@ redlight/
 - **Email Verification** – Optional SMTP-based email verification with resend support
 - **CORS Protection** – Restricted to `APP_URL` in production, open in development
 - **Rate Limiting** – Login, register, profile, password, avatar, guest-join, and federation endpoints
-- **Input Validation** – Email regex, field length limits, theme/language allowlists, hex-color format checks
+- **Input Validation** – Email regex, field length limits, ID format checks, hex-color format checks
 - **Timing-Safe Comparisons** – Access codes and moderator codes compared via `crypto.timingSafeEqual`
 - **Upload Safety** – Streaming body size limits (avatar 5 MB, presentation 50 MB) abort early without buffering
 - **XSS / Injection Prevention** – HTML-escaped emails, XML-escaped BBB API parameters, SVG logos served as `attachment`

server/routes/auth.js

@@ -11,8 +11,6 @@ import { getDb } from '../config/database.js';
 import redis from '../config/redis.js';
 import { authenticateToken, generateToken } from '../middleware/auth.js';
 import { isMailerConfigured, sendVerificationEmail } from '../config/mailer.js';
-import { themes } from '../../src/themes/index.js';
-import { languages } from '../../src/i18n/index.js';
 
 if (!process.env.JWT_SECRET) {
   console.error('FATAL: JWT_SECRET environment variable is not set.');
@@ -35,8 +33,8 @@ function makeRedisStore(prefix) {
 // ── Validation helpers ─────────────────────────────────────────────────────
 const EMAIL_RE = /^[^\s@]{1,64}@[^\s@]{1,253}\.[^\s@]{2,}$/;
 
-const VALID_THEMES = new Set(themes.map(t => t.id));
-const VALID_LANGUAGES = new Set(Object.keys(languages));
+// Simple format check for theme/language IDs (actual validation happens on the frontend)
+const SAFE_ID_RE = /^[a-zA-Z0-9_-]{1,50}$/;
 
 // Allowlist for CSS color values – only permits hsl(), hex (#rgb/#rrggbb) and plain names
 const SAFE_COLOR_RE = /^(?:#[0-9a-fA-F]{3,8}|hsl\(\d{1,3},\s*\d{1,3}%,\s*\d{1,3}%\)|[a-zA-Z]{1,30})$/;
@@ -383,11 +381,11 @@ router.put('/profile', authenticateToken, profileLimiter, async (req, res) => {
       return res.status(400).json({ error: 'Display name must not exceed 100 characters' });
     }
 
-    // M2: theme and language allowlists
-    if (theme !== undefined && theme !== null && !VALID_THEMES.has(theme)) {
+    // Theme and language: basic format validation (frontend handles actual ID matching)
+    if (theme !== undefined && theme !== null && (typeof theme !== 'string' || !SAFE_ID_RE.test(theme))) {
       return res.status(400).json({ error: 'Invalid theme' });
     }
-    if (language !== undefined && language !== null && !VALID_LANGUAGES.has(language)) {
+    if (language !== undefined && language !== null && (typeof language !== 'string' || !SAFE_ID_RE.test(language))) {
       return res.status(400).json({ error: 'Invalid language' });
     }
 

server/routes/branding.js

@@ -5,14 +5,13 @@ import fs from 'fs';
 import { fileURLToPath } from 'url';
 import { getDb } from '../config/database.js';
 import { authenticateToken, requireAdmin } from '../middleware/auth.js';
-import { themes } from '../../src/themes/index.js';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 
 const router = Router();
 
-const VALID_THEMES = new Set(themes.map(t => t.id));
+const SAFE_ID_RE = /^[a-zA-Z0-9_-]{1,50}$/;
 
 // Ensure uploads/branding directory exists
 const brandingDir = path.join(__dirname, '..', '..', 'uploads', 'branding');
@@ -180,8 +179,8 @@ router.put('/default-theme', authenticateToken, requireAdmin, async (req, res) =
     if (!defaultTheme || !defaultTheme.trim()) {
       return res.status(400).json({ error: 'defaultTheme is required' });
     }
-    // H4: validate against known theme IDs
-    if (!VALID_THEMES.has(defaultTheme.trim())) {
+    // Basic format validation for theme ID
+    if (!SAFE_ID_RE.test(defaultTheme.trim())) {
       return res.status(400).json({ error: 'Invalid theme' });
     }
     await setSetting('default_theme', defaultTheme.trim());