# Core-PHP Code Review - January 2026

Comprehensive Opus-level code review of all Core/* modules.

## Summary

| Severity | Count | Status |
|----------|-------|--------|
| Critical | 15 | All Fixed |
| High | 52 | 51 Fixed |
| Medium | 38 | All Fixed |
| Low | 32 | All Fixed |

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## Critical Issues Fixed

### Bouncer/BlocklistService.php
- **Missing table existence check** - Added cached `tableExists()` check.

### Cdn/Services/StorageUrlResolver.php
- **Weak token hashing** - Changed to HMAC-SHA256.

### Config/ConfigService.php
- **SQL injection via LIKE wildcards** - Added wildcard escaping.

### Console/Boot.php
- **References non-existent commands** - Commented out missing commands.

### Console/Commands/InstallCommand.php
- **Regex injection** - Added `preg_quote()`.

### Input/Sanitiser.php
- **Nested arrays become null** - Implemented recursive filtering.

### Mail/EmailShieldStat.php
- **Race condition** - Changed to atomic `insertOrIgnore()` + `increment()`.

### ModuleScanner.php
- **Duplicate code** - Removed duplicate.
- **Missing namespaces** - Added Website and Plug namespace handling.

### Search/Unified.php
- **Missing class_exists check** - Added guard.

### Seo/Schema.php, SchemaBuilderService.php, SeoMetadata.php
- **XSS vulnerability** - Added `JSON_HEX_TAG` flag.

### Storage/CacheResilienceProvider.php
- **Hardcoded phpredis** - Added Predis support with fallback.

---

## High Severity Issues Fixed

### Bouncer (3/3)
- BlocklistService auto-block workflow with pending/approved/rejected status
- TeapotController rate limiting with configurable max attempts
- HoneypotHit configurable severity levels

### Cdn (4/5)
- BunnyStorageService retry logic with exponential backoff
- BunnyStorageService file size validation
- BunnyCdnService API key redaction in errors
- StorageUrlResolver configurable signed URL expiry
- *Remaining: Integration tests*

### Config (4/4)
- ConfigService value type validation
- ConfigResolver max recursion depth
- Cache invalidation strategy documented

### Console (3/3)
- InstallCommand credential masking
- InstallCommand rollback on failure
- Created MakeModCommand, MakePlugCommand, MakeWebsiteCommand

### Crypt (3/3)
- LthnHash multi-key rotation support
- LthnHash MEDIUM_LENGTH and LONG_LENGTH options
- QuasiHash security documentation

### Events (3/3)
- Event prioritization via array syntax
- EventAuditLog for replay/audit logging
- Dead letter queue via recordFailure()

### Front (3/3)
- AdminMenuProvider permission checks
- Menu item caching with configurable TTL
- DynamicMenuProvider interface

### Headers (3/3)
- CSP configurable, unsafe-inline only in dev
- Permissions-Policy header with 19 feature controls
- Environment-specific header configuration

### Input (3/3)
- Schema-based per-field filter rules
- Unicode NFC normalisation
- Audit logging with PSR-3 logger

### Lang (3/3)
- LangServiceProvider auto-discovery
- Fallback locale chain support
- Translation key validation

### Mail (3/3)
- Disposable domain auto-update
- MX lookup caching
- Data retention cleanup command

### Media (4/4)
- Local abstracts to remove Core\Mod\Social dependency
- Memory limit checks before image processing
- HEIC/AVIF format support

### Search (3/3)
- Configurable API endpoints
- Search result caching
- Wildcard DoS protection

### Seo (3/3)
- Schema validation against schema.org
- Sitemap generation (already existed)

### Service (2/2)
- ServiceVersion with semver and deprecation
- HealthCheckable interface and HealthCheckResult

### Storage (3/3)
- RedisFallbackActivated event
- CacheWarmer with registration system
- Configurable exception throwing

---

## Medium Severity Issues Fixed

- Bouncer pagination for large blocklists
- CDN URL building consistency, content-type detection, health check
- Config soft deletes, sensitive value encryption, ConfigProvider interface
- Console progress bar, --dry-run option
- Crypt fast hash with xxHash, benchmark method
- Events PHPDoc annotations, event versioning
- Front icon validation, menu priority constants
- Headers nonce-based CSP, configuration UI
- Input HTML subset for rich text, max length enforcement
- Lang pluralisation rules, ICU message format
- Mail async validation, email normalisation
- Media queued conversions, EXIF stripping, progressive JPEG
- Search scoring tuning, fuzzy search, analytics tracking
- SEO lazy schema loading, OG image validation, canonical conflict detection
- Service dependency declaration, discovery mechanism
- Storage circuit breaker, metrics collection

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## Low Severity Issues Fixed

- Bouncer unit tests, configuration documentation
- CDN PHPDoc return types, CdnUrlBuilder extraction
- Config import/export, versioning for rollback
- Console autocompletion, colorized output
- Crypt algorithm documentation, constant-time comparison docs
- Events listener profiling, flow diagrams
- Front fluent menu builder, menu grouping
- Headers testing utilities, CSP documentation
- Input filter presets, transformation hooks
- Lang translation coverage reporting, translation memory
- Mail validation caching, disposable domain documentation
- Media progress reporting, lazy thumbnail generation
- Search suggestions/autocomplete, result highlighting
- SEO score trend tracking, structured data testing
- Service registration validation, lifecycle documentation
- Storage hit rate monitoring, multi-tier caching

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*Review performed by: Claude Opus 4.5 code review agents*
*Implementation: Claude Opus 4.5 fix agents (9 batches)*