---
id: CVE-2026-85520
title: >-
  Google Merchant Center Feed (gmfeed) module for PrestaShop is vulnerable to
  unauthenticated arbitrary file write in the feed.php endpoint
summary: >-
  Google Merchant Center Feed (gmfeed) module for PrestaShop is vulnerable to
  unauthenticated arbitrary file write in the feed.php endpoint. An
  unauthenticated attacker can send a crafted request that controls the output
  file name, path, e…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L'
cwe:
  - CWE-73
vendor: MyPresta
product: Google Merchant Center Feed
affected:
  - google_merchant_center_feed >= 1.9.1 <= 2.3.8
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T12:17:12.283'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85520'
references:
  - url: 'https://cert.pl/en/posts/2026/09/CVE-2026-85520'
    label: cvd@cert.pl
  - url: 'https://mypresta.eu/news/google-merchant-center-security-fix-2026.html'
    label: cvd@cert.pl
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-29T11:32:41.246Z'
---

## Overview

Google Merchant Center Feed (gmfeed) module for PrestaShop is vulnerable to unauthenticated arbitrary file write in the feed.php endpoint. An unauthenticated attacker can send a crafted request that controls the output file name, path, extension, and content through request parameters. Due to the lack of authentication and input validation, the request is processed successfully, allowing an attacker to write and execute arbitrary PHP code, resulting in remote code execution (RCE).


This issue was fixed in version 2.3.9.

## Remediation

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