{"id":"CVE-2026-54390","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-54390","summary":"JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unauthenticated attackers to inject malicious template syntax due to unsanitized…","details":"JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unauthenticated attackers to inject malicious template syntax due to unsanitized user-supplied input passed to the Smarty template engine. Attackers can exploit this flaw to read sensitive server-side values such as database credentials and encryption keys, and on versions 5.4.0 through 5.7.1, leverage registered Smarty modifiers including unserialize and file_get_contents to write a webshell to the web root and execute arbitrary commands as the web server user.","published":"2026-06-18T18:16:19.943","modified":"2026-06-23T13:16:42.893","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/"},{"type":"WEB","url":"https://sansec.io/research/jtl-shop-ssti-rce"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-06-23T13:16:42.893"}}