KH Remove Duplicates Security & Risk Analysis

The "knowhalim-remove-duplicates" v1.0.0 plugin exhibits a mixed security posture. On the positive side, it avoids dangerous functions, uses prepared statements for all SQL queries, and has no recorded vulnerability history, suggesting a generally well-developed codebase. The absence of file operations and external HTTP requests is also a good sign. However, the plugin presents significant security concerns due to its limited attack surface being entirely unprotected. The presence of an AJAX handler without any authentication or capability checks creates a direct entry point for potential malicious actions. Furthermore, the lack of nonce checks on this AJAX handler makes it susceptible to Cross-Site Request Forgery (CSRF) attacks.