CVSS v3.x: 9.8 (Critical)
- <= 188.8.131.52
- >= 184.108.40.206
Arbitrary code execution (via backdoor code, when downloaded from rubygems.org) was discovered in bootstrap-sass 220.127.116.11.
Users are advised to upgrade immediately to 18.104.22.168
An unauthenticated attacker can craft the ___cfduid cookie value with base64 arbitrary code to be executed via eval(), which can be leveraged to execute arbitrary code on the target system. (Note that there are three underscore characters in the cookie name. This is unrelated to the __cfduid cookie that is legitimately used by Cloudflare.)