CVE-2026-54390
JTL Shop < 5.7.2 Server-Side Template Injection via Smarty Renderer
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1336 |
| Vendor | jtl software |
| Product | jtl shop |
| Published | Jun 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
JTL Software / JTL Shop
5.2.0 ≤ 5.3.x 5.4.0 ≤ 5.7.1
References
Credits
Sansec