Yuxu focused on enhancing security scanning in the joernio/joern repository by developing a PHP frontend vulnerability detection feature within queryDB. Leveraging Joern, Scala, and PHP, Yuxu implemented new queries to identify vulnerabilities such as SQL injection, command injection, code injection, unrestricted file uploads, and XSS in PHP code paths. The work included adding unit tests to validate these security checks, ensuring ongoing reliability and maintainability. Additionally, Yuxu improved the PHP version check logic to reduce false negatives, thereby increasing the accuracy of automated security analysis and supporting more robust detection of insecure patterns in PHP frontend applications.