WPCOM Member Security & Risk Analysis

The 'wpcom-member' plugin version 1.7.19 exhibits a concerning security posture, despite some positive aspects. While it demonstrates good practices in utilizing prepared statements for SQL queries and proper output escaping, significant vulnerabilities are present in its attack surface and past security history. A substantial number of AJAX handlers (32 out of 39) lack authentication checks, creating a wide entry point for attackers. Furthermore, the taint analysis revealed four high-severity flows with unsanitized paths, indicating potential for critical exploits if these flows are triggered by user input. The plugin's vulnerability history is also a major red flag, with a significant number of known CVEs, including two critical and four high-severity ones, even though none are currently unpatched. The recurring vulnerability types such as Remote File Inclusion, SQL Injection, and Cross-site Scripting suggest fundamental security weaknesses that have been historically difficult to fully address. While the absence of bundled libraries and the use of nonces and capability checks on some entry points are positive, the numerous unprotected AJAX handlers and the history of severe vulnerabilities paint a picture of a plugin that requires immediate attention and remediation to mitigate significant risks.