unicode-security-anti-pattern

What problem does it solve?

This Skill protects against vulnerabilities arising from improper handling of Unicode characters, preventing issues like username spoofing, phishing, and validation bypasses.

Core Features & Use Cases

• Confusable Character Detection: Identifies characters that look alike but are different (e.g., Latin 'a' vs. Cyrillic 'а').
• Normalization: Ensures consistent string representation by handling precomposed vs. combining characters.
• Zero-Width Character Stripping: Removes non-printing characters that can hide malicious content or alter string lengths.
• Bidirectional Text Protection: Mitigates attacks that reorder text display to obfuscate file names or commands.
• Use Case: Securely authenticate users by ensuring that usernames like "admin" and "аdmin" (with a Cyrillic 'a') are treated distinctly or rejected, preventing account takeovers.

Quick Start

Normalize and sanitize the provided username string to prevent Unicode-based attacks.