Drupal before 7.58, 8.x before 8.3.9, 8.4.x before 8.4.6, and 8.5.x before 8.5.1 allows remote attackers to execute arbitrary code because of an issue affecting multiple subsystems with default or common module configurations.
https://www.cisa.gov/news-events/cybersecurity-advisories/aa21-209a
https://www.cisa.gov/news-events/cybersecurity-advisories/aa20-133a
https://www.tenable.com/blog/critical-drupal-core-vulnerability-what-you-need-to-know
https://www.synology.com/support/security/Synology_SA_18_17
https://www.exploit-db.com/exploits/44482/
https://www.exploit-db.com/exploits/44449/
https://www.exploit-db.com/exploits/44448/
https://www.drupal.org/sa-core-2018-002
https://www.debian.org/security/2018/dsa-4156
https://twitter.com/arancaytar/status/979090719003627521
https://twitter.com/RicterZ/status/984495201354854401
https://twitter.com/RicterZ/status/979567469726613504
https://research.checkpoint.com/uncovering-drupalgeddon-2/
https://lists.debian.org/debian-lts-announce/2018/03/msg00028.html
https://groups.drupal.org/security/faq-2018-002
https://greysec.net/showthread.php?tid=2912&pid=10561
https://github.com/g0rx/CVE-2018-7600-Drupal-RCE
https://github.com/a2u/CVE-2018-7600
https://blog.appsecco.com/remote-code-execution-with-drupal-core-sa-core-2018-002-95e6ecc0c714
https://badpackets.net/over-100000-drupal-websites-vulnerable-to-drupalgeddon-2-cve-2018-7600/