Craft is a content management system (CMS). Prior to 4.12.2 and 5.4.3, Craft is missing normalizePath in the function FileHelper::absolutePath could lead to Remote Code Execution on the server via twig SSTI. This is a sequel to CVE-2023-40035. This vulnerability is fixed in 4.12.2 and 5.4.3.
https://github.com/craftcms/cms/security/advisories/GHSA-f3cw-hg6r-chfv
https://github.com/craftcms/cms/commit/123e48a696de1e2f63ab519d4730eb3b87beaa58