pac4j — Vulnerabilities & Security Advisories 9

Pac4j is an open-source Java security framework that provides authentication and authorization for web applications, supporting over 30 integration protocols. Historically, vulnerabilities have included cross-site scripting (XSS), remote code execution (RCE), and privilege escalation, often stemming from improper input validation or insecure default configurations. The framework's modular architecture introduces potential attack surfaces through its numerous connectors. While no major public incidents have been documented, the four recorded CVEs highlight risks in components like OAuth and SAML implementations, emphasizing the need for careful configuration and regular updates when implementing this authentication solution.