The vulnerability stems from mismatched hostname handling between JBoss AS 7 and mod_cluster when processing excluded contexts. The critical functions would be those responsible for: 1) Processing exclusion patterns (ModClusterSubsystem.addExcludedContext) which lacked hostname auto-prepend in vulnerable versions, and 2) Host configuration setup (ModClusterService.configureHosts) that established the mismatched default host conventions. These functions would appear in runtime profiling during context registration/request handling when excluded contexts are evaluated. The medium confidence reflects inference from vulnerability descriptions rather than direct patch analysis.