The vulnerability stems from improper file permissions on the spring-security.xsd file in the JAR, not from specific code functions. The root cause was a build process issue where the file was included with world-writable permissions. The commit diff shows the fix involved automating XSD generation and removing manual symlink handling, which addressed the permission issue. No specific code functions (e.g., business logic methods) are directly vulnerable; the problem was in build configuration and packaging steps. Thus, no traditional 'functions' in the codebase can be identified as vulnerable with high confidence.