The vulnerability explicitly states that credentials are stored unencrypted in the global configuration file (io.jenkins.plugins.delphix.GlobalConfiguration.xml). In Jenkins plugin architecture, the GlobalConfiguration class typically handles global settings persistence. The configure() method in such classes is responsible for saving configuration data, including credentials, to disk. The lack of encryption in storage implies this method does not apply cryptographic protections. Additionally, job configuration files (config.xml) may inherit credentials via descriptor classes, which could explain the medium-confidence entry. The exact function names are inferred from standard Jenkins plugin patterns since no patch or code diffs are available.