Sebastian Neef, a prominent IT security freelancer, examines how WordPress plugins leak sensitive data, highlighting the security risks associated with relying on third-party plugins. The OWASP Top 10 identifies sensitive data exposure as a top web security issue, and Neef's research focuses on popular WordPress plugins with over 300,000 active installations that are vulnerable to remote exploitation. He categorizes leaked information into credentials, personal identifiable information (PII), and system information, emphasizing that such leaks often stem from WordPress's file permission settings and improper handling of log files by plugins. The analysis reveals that static file paths and directory listing vulnerabilities can expose sensitive log files, while randomizing file names and preventing directory listing can mitigate these risks. Neef advocates for enhanced security practices among both plugin developers and administrators, providing remediation tips and suggesting the use of Detectify's automated security monitoring to identify and address potential vulnerabilities.