This affects the package ini before 1.3.6. If an attacker submits a malicious INI file to an application that parses it with ini.parse, they will pollute the prototype on the application. This can be exploited further depending on the context.
https://snyk.io/vuln/SNYK-JS-INI-1048974
https://lists.debian.org/debian-lts-announce/2020/12/msg00032.html
https://github.com/npm/ini/commit/56d2805e07ccd94e2ba0984ac9240ff02d44b6f1