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CVE-2026-85520— Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module

Quick assessment

Affected
MyPresta Google Merchant Center Feed
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PrestaShop 的 Google Merchant Center Feed（gmfeed）模块存在未认证任意文件写入漏洞，影响 feed.php 端点。未经身份验证的攻击者可以发送精心构造的请求，通过请求参数控制输出文件的文件名、路径、扩展名和内容。由于缺乏身份验证和输入验证机制，该请求会被成功处理，从而允许攻击者写入并执行任意 PHP 代码，最终导致远程代码执行（RCE）。 该问题已在版本 2.3.9 中修复。

CVSS 9.3 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
MyPresta Google Merchant Center Feed 1.9.1≤ 2.3.8 affected
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I. Basic Information for CVE-2026-85520

Vulnerability Information
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Vulnerability Title
Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MyPresta Google Merchant Center Feed 1.9.1 ~ 2.3.8 -

II. Public POCs for CVE-2026-85520

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III. Intelligence Information for CVE-2026-85520

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Security Blog Posts for CVE-2026-85520 (1)

Other References for CVE-2026-85520 (1)

IV. Related Vulnerabilities

Same weakness: CWE-73

V. Comments for CVE-2026-85520

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