GHSA-CRCQ-738G-PQVC Craft CMS Potential Remote Code Execution via Twig SSTI
Note that users must have administrator access to the Craft Control Panel, and allowAdminChanges must be enabled for this to work, which is against Craft CMS' recommendations for any non-dev environment. https://craftcms.com/knowledge-base/securing-craftset-allowAdminChanges-to-false-in-productio...