CVE-2026-54390 – JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer

​CVE ID :CVE-2026-54390

Published : June 18, 2026, 5:33 p.m. | 1 hour, 14 minutes ago

Description :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.

Severity: 9.8 | CRITICAL

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