Vulnerability in MyPresta Google Merchant Center Feed software

CERT Polska has received a report about vulnerability in MyPresta Google Merchant Center Feed software and participated in coordination of its disclosure.

The vulnerabilityCVE-2026-85520: Google Merchant Center Feed (gmfeed) module for PrestaShop is vulnerable to unauthenticated arbitrary file write in thefeed.phpendpoint. 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.

We thank Today Group sp. z o.o. for the responsible vulnerability report.