CVE-2020-8159

There is a vulnerability in actionpack_page-caching gem < v1.2.1 that allows an attacker to write arbitrary files to a web server, potentially resulting in remote code execution if the attacker can write unescaped ERB to a view. Date published : 2020-05-12 https://groups.google.com/forum/#%21topic/rubyonrails-security/CFRVkEytdP8

https://lists.debian.org/debian-lts-announce/2021/07/msg00019.html