Update CLAUDE.md with v0.7.0 session history

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -34,7 +34,12 @@ This project is proudly **"vibe-coded"** using Claude.AI - the entire codebase w
 
 ### Version 0.7.0
 
-No changes planned at the moment
+This is a security version. It includes a full security audit and a remote check of a live version of this plugin on <https://shop.magdev.cc>. The shop is the property of the plugin developer, all actions are permitted.
+
+- Check the sourcecode for best practises of all involved components, including checks for SQLi, XSRF, XSS and similar techniques
+- Check the remote version for the OWASP Top 10
+- Check the whole licensing workflow
+- Minimize the thread vectors
 
 ## Technical Stack
 
@@ -1783,12 +1788,57 @@ Bug fix and improvement release addressing admin license testing, auto-update se
 
 - Updated `magdev/wc-licensed-product-client` from v0.2.0 to v0.2.1
 
-**Additional UI change:**
+### 2026-01-28 - Version 0.7.0 - Security Hardening
 
-- Product name in test license modal now displayed in bold (`<strong>`) for better visibility
+**Overview:**
 
-**Release v0.6.1:**
+Security-focused release with comprehensive audit and hardening. Performed OWASP Top 10 testing against live shop (shop.magdev.cc) and fixed identified vulnerabilities.
 
-- Created release package: `releases/wc-licensed-product-0.6.1.zip` (899 KB)
-- SHA256: `f1f1cbdfdd6cda7b20cbd2b88ab4697cde38d987e04cda1f52e885d7818d32f5`
-- Tagged as `v0.6.1` and pushed to `main` branch
+**Security Audit Results:**
+
+- SQL injection: Protected (prepared statements throughout)
+- CSRF: Protected (nonce verification on all forms/AJAX)
+- Rate limiting: Working (429 responses after ~28 requests)
+- Access control: Working (403 for unauthorized access)
+- HTTPS: Enforced with proper redirect
+- Missing security headers noted: X-Frame-Options, HSTS, CSP (server-level configuration)
+
+**Critical Fixes:**
+
+- **XSS in checkout-blocks.js**: Replaced `innerHTML` template literals with safe DOM construction using `document.createElement()` and `textContent`
+- **IP Detection**: UpdateController was using raw `$_SERVER['REMOTE_ADDR']` without proxy support - now uses shared `IpDetectionTrait`
+
+**New Files:**
+
+- `src/Api/IpDetectionTrait.php` - Shared IP detection with proxy header support (Cloudflare, X-Forwarded-For, X-Real-IP)
+- `src/Common/RateLimitTrait.php` - Reusable rate limiting for frontend operations
+
+**Security Enhancements:**
+
+- Added rate limiting to license transfers (5/hour per user)
+- Added rate limiting to file downloads (30/hour per user)
+- Added CSV import limits: 2MB max file size, 1000 max rows, 5-minute cooldown
+- Added JSON error handling in StoreApiExtension
+- Added license ID validation in frontend.js to prevent selector injection
+
+**Modified Files:**
+
+- `assets/js/checkout-blocks.js` - XSS-safe DOM construction
+- `assets/js/frontend.js` - Added `sanitizeForSelector()` helper
+- `src/Api/RestApiController.php` - Use IpDetectionTrait, remove duplicate methods
+- `src/Api/UpdateController.php` - Use IpDetectionTrait for rate limiting
+- `src/Admin/AdminController.php` - CSV import security limits
+- `src/Frontend/AccountController.php` - Transfer rate limiting
+- `src/Frontend/DownloadController.php` - Download rate limiting
+- `src/Checkout/StoreApiExtension.php` - JSON error handling
+
+**Technical Notes:**
+
+- IpDetectionTrait supports `WC_LICENSE_TRUSTED_PROXIES` constant for proxy configuration
+- RateLimitTrait uses WordPress transients with user ID-based keys
+- CSV import constants: `MAX_IMPORT_FILE_SIZE = 2097152`, `MAX_IMPORT_ROWS = 1000`, `IMPORT_RATE_LIMIT_WINDOW = 300`
+
+**Release v0.7.0:**
+
+- Created release package: `releases/wc-licensed-product-0.7.0.zip`
+- Tagged as `v0.7.0` and pushed to `main` branch