Jenkins Pipeline: Deprecated Groovy Libraries Plugin 552.vd9cc05b8a2e1 and earlier uses the names of Pipeline libraries to create directories without canonicalization or sanitization.
This allows attackers with Item/Configure permission to execute arbitrary code in the context of the Jenkins controller JVM using specially crafted library names if a global Pipeline library is already configured.
Pipeline: Deprecated Groovy Libraries Plugin 561.va_ce0de3c2d69 sanitizes the names of Pipeline libraries when creating library directories.