PluginScript attempts to chroot the plugin to the repoManagerRoot, this root is frequently / (the system root) in standard configurations or when using --root. If the chroot target is /, it is a no-op, allowing the traversed path to execute host binaries (like /bin/bash) with root privileges.
Exploitability
AV:LAC:LAT:NPR:NUI:PVulnerable System
VC:HVI:HVA:HSubsequent System
SC:NSI:NSA:N8.5/CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NOther