---
id: CVE-2026-103528
title: >-
  Thelia 2.6.0 uses Smarty for email templates without properly restricting
  access to dangerous PHP functions
summary: >-
  Thelia 2.6.0 uses Smarty for email templates without properly restricting
  access to dangerous PHP functions. An authenticated administrator can inject
  malicious Smarty expressions into email templates via the messages
  configuration inter…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-1336
vendor: Thelia
product: Thelia
affected:
  - Thelia <= 2.6.0
published: '2026-10-12'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T17:17:11.000'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103528'
references:
  - url: 'https://kb.cert.org/vuls/id/162329'
    label: cret@cert.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T17:00:27.510535Z'
epss: 0.00517
epssPercentile: 0.4378
ingestedAt: '2026-10-12T15:55:08.155Z'
---

## Overview

Thelia 2.6.0 uses Smarty for email templates without properly restricting access to dangerous PHP functions. An authenticated administrator can inject malicious Smarty expressions into email templates via the messages configuration interface, and when the template is previewed or rendered, functions such as system(), exec(), file_put_contents(), and file_get_contents() can be executed with the privileges of the web process. This allows arbitrary OS command execution, file read/write operations, and RCE on the underlying server.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.