ServerRewards Vulnerability Fix

[FiveDollaGobby]

Command Injection Prevention

• Implemented a comprehensive command whitelist system that only allows safe, predefined commands
• Added command sanitization to prevent malicious command injection through reward configurations
• Blocked dangerous commands including operator privileges, server control, and administrative functions
• Enhanced error handling with detailed logging for security monitoring

Input Validation & Data Integrity

• Added comprehensive bounds checking for all numeric inputs to prevent integer overflow attacks
• Implemented strict validation for point values, preventing negative or excessively large values
• Enhanced error handling with proper exception management and user feedback
• Added input sanitization for player names and command parameters

Thread Safety & Concurrency

• Replaced all HashMap implementations with ConcurrentHashMap for thread-safe operations
• Eliminated race conditions that could lead to data loss or corruption
• Ensured atomic operations for player data management across multiple threads
• Implemented proper synchronization for economy and challenge tracking systems