← Vulnerability feed

Vulnerability record · CVE-2026-54390 · published 18 June 2026

CVE-2026-54390: JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unau…

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.

9.3 CVSS 4.0 Critical EPSS 0.60% · top 53.2% CWE-1336 · CWE-1336 Deferred
9.3CVSS 4.0 base score
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
23 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://forum.jtl-software.de/threads/jtl-shop-5-7-aktuell-5-7-2.246278/
https://sansec.io/research/jtl-shop-ssti-rce
https://www.vulncheck.com/advisories/jtl-shop-server-side-template-injection-via-smarty-renderer

Track CVE-2026-54390 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-75650Adobe Commerce template engine flaw allows unauthenticated remote code executionAdobe Commerce, Commerce B2B and Magento are affected by improper neutralization of special elements used in a template engine (CWE-1336), allowing a…KEVEPSS 3.9%analysed9.8CVE-2024-23692Rejetto HTTP File Server template injection leads to unauthenticated RCERejetto HTTP File Server through version 2.3m is vulnerable to template injection, allowing a remote unauthenticated attacker to execute arbitrary co…KEVEPSS 99%analysed10.0CVE-2024-4040CrushFTP server-side template injection enables unauthenticated sandbox escape and RCECrushFTP versions before 10.7.1 and 11.1.0 contain a server-side template injection flaw that lets unauthenticated remote attackers escape the VFS sa…KEVEPSS 100%analysed

Source: NIST National Vulnerability Database (record CVE-2026-54390), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.