JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer_CVE-2026-54390

{
    "lastseen": "",
    "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.",
    "published": "2026-06-18T17:33:46.230Z",
    "modified": "2026-06-18T17:33:46.230Z",
    "type": "cve",
    "title": "JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer",
    "source": "VulnCheck",
    "references": "https://sansec.io/research/jtl-shop-ssti-rce\nhttps://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/\nhttps://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer",
    "id": "CVE-2026-54390",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1336"
    ],
    "cvelist": null,
    "sourceData": "JTL Software JTL Shop 5.2.0\nJTL Software JTL Shop 5.4.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "JTL Shop",
    "version": "5.0.0",
    "vendor": "JTL Software",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}