All the vulnerabilities related to the version 2.1.0 of the package
ejs template injection vulnerability
The ejs (aka Embedded JavaScript templates) package 3.1.6 for Node.js allows server-side template injection in settings[view options][outputFunctionName]. This is parsed as an internal option, and overwrites the outputFunctionName option with an arbitrary OS command (which is executed upon template compilation).
ejs lacks certain pollution protection
The ejs (aka Embedded JavaScript templates) package before 3.1.10 for Node.js lacks certain pollution protection.