GSheetConnector for CF7 – Connect Contact Form 7 to Google Sheets and Send Form Submissions in Real Time Security & Risk Analysis

The 'cf7-google-sheets-connector' plugin v5.1.6 exhibits a mixed security posture. While static analysis shows a strong adherence to output escaping and a good number of nonce and capability checks, the presence of a dangerous `unserialize` function is a significant concern. Taint analysis did not reveal any critical or high severity unsanitized paths, which is a positive sign. However, the plugin's vulnerability history, with four known CVEs including one high and three medium severity issues, suggests a pattern of past security weaknesses. The common vulnerability types (Missing Authorization, Information Exposure, XSS) indicate areas where the plugin has historically struggled to properly validate and sanitize user input and manage access controls.

Despite the historical issues, the fact that there are currently no unpatched CVEs is encouraging. The static analysis revealing no unprotected entry points in AJAX handlers or REST API routes is also a strong point. Nevertheless, the `unserialize` function represents a potential avenue for attacks if not handled with extreme care and robust input validation. The historical trend of vulnerabilities, even if currently patched, warrants vigilance. The overall risk is moderate, with the primary concern being the inherent danger of `unserialize` and the past tendency for authorization and input validation flaws.