The vulnerability stems from the plugin allowing agent-specified paths to the 'git' executable on the controller. Functions responsible for git command execution (common in package builder workflows) would naturally accept path parameters. Without validation() or sandboxing, these functions would execute arbitrary commands when the path points to a malicious binary. The high confidence comes from the direct match between the vulnerability description (agent-controlled git path leading to RCE) and typical Jenkins plugin patterns for external command execution.