---
id: CVE-2026-107248
title: >-
  Thelia 3.0.0's back-office Email/Messages feature contains a server‑side
  template injection (SSTI) flaw that allows any authenticated user with the
  “Messages” permission to supply unsandboxed Twig templates, which are then
  compiled and e…
summary: >-
  Thelia 3.0.0's back-office Email/Messages feature contains a server‑side
  template injection (SSTI) flaw that allows any authenticated user with the
  “Messages” permission to supply unsandboxed Twig templates, which are then
  compiled and e…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
  - CWE-1336
vendor: Thelia
product: Thelia
affected:
  - Thelia 3.0.0
published: '2026-10-12'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T18:17:24.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107248'
references:
  - url: 'https://kb.cert.org/vuls/id/162329'
    label: cret@cert.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T17:06:50.926485Z'
epss: 0.0047
epssPercentile: 0.40437
ingestedAt: '2026-10-12T16:57:59.910Z'
---

## Overview

Thelia 3.0.0's back-office Email/Messages feature contains a server‑side template injection (SSTI) flaw that allows any authenticated user with the “Messages” permission to supply unsandboxed Twig templates, which are then compiled and executed as raw code. By modifying Message content, an attacker can execute arbitrary PHP functions, read sensitive files, and potentially write to the filesystem, leading to full compromise of the application and underlying host. This vulnerability has been patched in thelia/twig-engine-module 1.0.9.

## Remediation

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