q-invoice connect for Gravity Forms Security & Risk Analysis

The plugin "qinvoice-connect-for-gravity-forms" v2.3.2 exhibits a mixed security posture. On the positive side, it demonstrates good practices by utilizing prepared statements for all SQL queries, performing output escaping on a majority of its outputs, and having no recorded historical vulnerabilities, suggesting a generally well-maintained codebase. However, a significant concern arises from the presence of one unprotected AJAX handler, which represents a direct entry point that could be exploited by unauthenticated users. The absence of nonce checks on this handler further exacerbates this risk, making it vulnerable to Cross-Site Request Forgery (CSRF) attacks. While taint analysis showed no issues, the single unprotected AJAX endpoint is a critical oversight that needs immediate attention.