Emercury Extension For Contact Form 7 Security & Risk Analysis

The plugin 'emercury-extension-for-contact-form-7' v1.0.2 exhibits a concerning security posture primarily due to its extensive unprotected attack surface. While the code analysis reveals no directly dangerous functions or SQL injection risks, the presence of six AJAX handlers without any authentication or capability checks is a significant vulnerability. This means any unauthenticated user could potentially trigger these handlers, leading to unintended actions or information disclosure depending on their functionality.

Furthermore, the taint analysis indicates that all five analyzed flows involve unsanitized paths. Although no critical or high-severity issues were flagged in the taint analysis, this finding, combined with the unprotected AJAX handlers, suggests a potential for Cross-Site Scripting (XSS) or other client-side attacks if these paths are directly influenced by user input without proper sanitization and output escaping. The fact that only 68% of outputs are properly escaped further exacerbates this risk. The absence of known CVEs is a positive sign, but it does not negate the immediate risks identified in the static and taint analyses.

In conclusion, while the plugin demonstrates good practices in SQL query handling and file operations, the lack of authorization checks on its AJAX endpoints and the presence of unsanitized paths are critical weaknesses. The plugin's security can be significantly improved by implementing nonce checks and capability checks on all AJAX handlers and ensuring thorough input sanitization and output escaping for all data processed through the identified taint flows. Until these issues are addressed, the plugin should be considered a moderate to high risk.